RedisClient Protocol Reference

eventLoop
The NIO.EventLoop that this client operates on.
Declaration
Swift

var eventLoop: EventLoop { get }
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                    send(command:with:)

Sends the desired command with the specified arguments.

Declaration

Swift

func send(command: String, with arguments: [RESPValue]) -> EventLoopFuture<RESPValue>

Parameters

`command`	The command to execute.
`arguments`	The arguments, if any, to be sent with the command.

Return Value

A NIO.EventLoopFuture that will resolve with the Redis command response.

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                    logging(to:)

Temporarily overrides the default logger for command logs to the provided instance.

Declaration

Swift

func logging(to logger: Logger) -> RedisClient

Parameters


                                logger

The Logging.Logger instance to use for command logs.

Return Value

A RedisClient with the temporary override for command logging.

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                    subscribe(to:messageReceiver:onSubscribe:onUnsubscribe:)

Default implementation

Subscribes the client to the specified Redis channels, invoking the provided message receiver each time a message is published.

See SUBSCRIBE

Important

This will establish the client in a “PubSub mode” where only a specific list of commands are allowed to be executed.

Commands issued with this client outside of that list will resolve with failures.

See the PubSub specification

Default Implementation

Declaration

Swift

func subscribe(
    to channels: [RedisChannelName],
    messageReceiver receiver: @escaping RedisSubscriptionMessageReceiver,
    onSubscribe subscribeHandler: RedisSubscriptionChangeHandler?,
    onUnsubscribe unsubscribeHandler: RedisSubscriptionChangeHandler?
) -> EventLoopFuture<Void>

Parameters

`channels`	The names of channels to subscribe to.
`receiver`	A closure which will be invoked each time a channel with a name in `channels` publishes a message.
`subscribeHandler`	An optional closure to be invoked when the subscription becomes active.
`unsubscribeHandler`	An optional closure to be invoked when the subscription becomes inactive.

Return Value

A notification NIO.EventLoopFuture that resolves once the subscription has been registered with Redis.

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                    psubscribe(to:messageReceiver:onSubscribe:onUnsubscribe:)

Default implementation

Subscribes the client to the specified Redis channel name patterns, invoking the provided message receiver each time a message is published to a matching channel.

Note

If the client is also subscribed to a channel directly by name which also matches a pattern, both subscription message receivers will be invoked.

See PSUBSCRIBE

Important

This will establish the client in a “PubSub mode” where only a specific list of commands are allowed to be executed.

Commands issues with this client outside of that list will resolve with failures.

See the PubSub specification

Default Implementation

Declaration

Swift

func psubscribe(
    to patterns: [String],
    messageReceiver receiver: @escaping RedisSubscriptionMessageReceiver,
    onSubscribe subscribeHandler: RedisSubscriptionChangeHandler?,
    onUnsubscribe unsubscribeHandler: RedisSubscriptionChangeHandler?
) -> EventLoopFuture<Void>

Parameters

`patterns`	A list of glob patterns used for matching against PubSub channel names to subscribe to.
`receiver`	A closure which will be invoked each time a channel with a name matching the specified pattern(s) publishes a message.
`subscribeHandler`	An optional closure to be invoked when the subscription becomes active.
`unsubscribeHandler`	An optional closure to be invoked when the subscription becomes inactive.

Return Value

A notification NIO.EventLoopFuture that resolves once the subscription has been registered with Redis.

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                    unsubscribe(from:)

Default implementation

Unsubscribes the client from a specific Redis channel from receiving any future published messages.

See UNSUBSCRIBE

Note

If the channel was not subscribed to with subscribe(to:messageReceiver:onSubscribe:onUnsubscribe:), then this method has no effect.

Important

If no more subscriptions (pattern or channel) are active on the client, the client will be taken out of its “PubSub mode”.

It will then be allowed to use any command like normal.

See the PubSub specification

Default Implementation

Declaration

Swift

func unsubscribe(from channels: [RedisChannelName]) -> EventLoopFuture<Void>

Parameters


                                channels

A list of channel names to be unsubscribed from.

Return Value

A notification NIO.EventLoopFuture that resolves once the subscription(s) have been removed from Redis.

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                    punsubscribe(from:)

Default implementation

Unsubscribes the client from a pattern of Redis channel names from receiving any future published messages.

See PUNSUBSCRIBE

Note

This method does not unsubscribe subscriptions made with subscribe(to:messageReceiver:onSubscribe:onUnsubscribe:).

Important

If no more subscriptions (pattern or channel) are active on the client, the client will be taken out of its “PubSub mode”.

It will then be allowed to use any command like normal.

See the PubSub specification

Default Implementation

Declaration

Swift

func punsubscribe(from patterns: [String]) -> EventLoopFuture<Void>

Parameters


                                patterns

A list of glob patterns to be unsubscribed from.

Return Value

A notification NIO.EventLoopFuture that resolves once the subscription(s) have been removed from Redis.

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                    echo(_:)

Extension method

Echos the provided message through the Redis instance.

See https://redis.io/commands/echo

Declaration

Swift

public func echo(_ message: String) -> EventLoopFuture<String>

Parameters


                                message

The message to echo.

Return Value

The message sent with the command.

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                    ping(with:)

Extension method

Pings the server, which will respond with a message.

See https://redis.io/commands/ping

Declaration

Swift

public func ping(with message: String? = nil) -> EventLoopFuture<String>

Parameters


                                message

The optional message that the server should respond with.

Return Value

The provided message or Redis’ default response of "PONG".

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                    select(database:)

Extension method

Select the Redis logical database having the specified zero-based numeric index.

Note

New connections always use the database 0.

https://redis.io/commands/select

Declaration

Swift

public func select(database index: Int) -> EventLoopFuture<Void>

Parameters


                                index

The 0-based index of the database that will receive later commands.

Return Value

An EventLoopFuture that resolves when the operation has succeeded, or fails with a RedisError.

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                    swapDatabase(_:with:)

Extension method

Swaps the data of two Redis databases by their index IDs.

See https://redis.io/commands/swapdb

Declaration

Swift

public func swapDatabase(_ first: Int, with second: Int) -> EventLoopFuture<Bool>

Parameters

`first`	The index of the first database.
`second`	The index of the second database.

Return Value

true if the swap was successful.

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                    authorize(with:)

Extension method

Requests the client to authenticate with Redis to allow other commands to be executed.

https://redis.io/commands/auth

Declaration

Swift

public func authorize(with password: String) -> EventLoopFuture<Void>

Parameters


                                password

The password to authenticate with.

Return Value

A NIO.EventLoopFuture that resolves if the password was accepted, otherwise it fails.

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                    delete(_:)

Extension method

Removes the specified keys. A key is ignored if it does not exist.

https://redis.io/commands/del

Declaration

Swift

public func delete(_ keys: [RedisKey]) -> EventLoopFuture<Int>

Parameters


                                keys

A list of keys to delete from the database.

Return Value

The number of keys deleted from the database.

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                    delete(_:)

Extension method

Removes the specified keys. A key is ignored if it does not exist.

https://redis.io/commands/del

Declaration

Swift

public func delete(_ keys: RedisKey...) -> EventLoopFuture<Int>

Parameters


                                keys

A list of keys to delete from the database.

Return Value

The number of keys deleted from the database.

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                    exists(_:)

Extension method

Checks the existence of the provided keys in the database.

https://redis.io/commands/exists

Declaration

Swift

public func exists(_ keys: [RedisKey]) -> EventLoopFuture<Int>

Parameters


                                keys

A list of keys whose existence will be checked for in the database.

Return Value

The number of provided keys which exist in the database.

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                    exists(_:)

Extension method

Checks the existence of the provided keys in the database.

https://redis.io/commands/exists

Declaration

Swift

public func exists(_ keys: RedisKey...) -> EventLoopFuture<Int>

Parameters


                                keys

A list of keys whose existence will be checked for in the database.

Return Value

The number of provided keys which exist in the database.

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                    expire(_:after:)

Extension method

Sets a timeout on key. After the timeout has expired, the key will automatically be deleted.

Note

A key with an associated timeout is often said to be “volatile” in Redis terminology.

https://redis.io/commands/expire

Declaration

Swift

public func expire(_ key: RedisKey, after timeout: TimeAmount) -> EventLoopFuture<Bool>

Parameters

`key`	The key to set the expiration on.
`timeout`	The time from now the key will expire at.

Return Value

true if the expiration was set.

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TTL


                    
                    
                    ttl(_:)

Extension method

Returns the remaining time-to-live (in seconds) of the provided key.

https://redis.io/commands/ttl

Declaration

Swift

public func ttl(_ key: RedisKey) -> EventLoopFuture<RedisKey.Lifetime>

Parameters

key

The key to check the time-to-live on.

Return Value

The number of seconds before the given key will expire.

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                    pttl(_:)

Extension method

Returns the remaining time-to-live (in milliseconds) of the provided key.

https://redis.io/commands/pttl

Declaration

Swift

public func pttl(_ key: RedisKey) -> EventLoopFuture<RedisKey.Lifetime>

Parameters

key

The key to check the time-to-live on.

Return Value

The number of milliseconds before the given key will expire.

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Scan


                    
                    
                    scan(startingFrom:matching:count:)

Extension method

Incrementally iterates over all keys in the currently selected database.

https://redis.io/commands/scan

Declaration

Swift

public func scan(
    startingFrom position: Int = 0,
    matching match: String? = nil,
    count: Int? = nil
) -> EventLoopFuture<(Int, [String])>

Parameters

`position`	The cursor position to start from.
`match`	A glob-style pattern to filter values to be selected from the result set.
`count`	The number of elements to advance by. Redis default is 10.

Return Value

A cursor position for additional invocations with a limited collection of keys found in the database.

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General


                    
                    
                    hdel(_:from:)

Extension method

Removes the specified fields from a hash.

See https://redis.io/commands/hdel

Declaration

Swift

public func hdel(_ fields: [String], from key: RedisKey) -> EventLoopFuture<Int>

Parameters

`fields`	The list of field names that should be removed from the hash.
`key`	The key of the hash to delete from.

Return Value

The number of fields that were deleted.

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                    hdel(_:from:)

Extension method

Removes the specified fields from a hash.

See https://redis.io/commands/hdel

Declaration

Swift

public func hdel(_ fields: String..., from key: RedisKey) -> EventLoopFuture<Int>

Parameters

`fields`	The list of field names that should be removed from the hash.
`key`	The key of the hash to delete from.

Return Value

The number of fields that were deleted.

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                    hexists(_:in:)

Extension method

Checks if a hash contains the field specified.

See https://redis.io/commands/hexists

Declaration

Swift

public func hexists(_ field: String, in key: RedisKey) -> EventLoopFuture<Bool>

Parameters

`field`	The field name to look for.
`key`	The key of the hash to look within.

Return Value

true if the hash contains the field, false if either the key or field do not exist.

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                    hlen(of:)

Extension method

Gets the number of fields contained in a hash.

See https://redis.io/commands/hlen

Declaration

Swift

public func hlen(of key: RedisKey) -> EventLoopFuture<Int>

Parameters

key

The key of the hash to get field count of.

Return Value

The number of fields in the hash, or 0 if the key doesn’t exist.

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                    hstrlen(of:in:)

Extension method

Gets the string length of a hash field’s value.

See https://redis.io/commands/hstrlen

Declaration

Swift

public func hstrlen(of field: String, in key: RedisKey) -> EventLoopFuture<Int>

Parameters

`field`	The field name whose value is being accessed.
`key`	The key of the hash.

Return Value

The string length of the hash field’s value, or 0 if the field or hash do not exist.

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                    hkeys(in:)

Extension method

Gets all field names in a hash.

See https://redis.io/commands/hkeys

Declaration

Swift

public func hkeys(in key: RedisKey) -> EventLoopFuture<[String]>

Parameters

key

The key of the hash.

Return Value

A list of field names stored within the hash.

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                    hvals(in:)

Extension method

Gets all values stored in a hash.

See https://redis.io/commands/hvals

Declaration

Swift

public func hvals(in key: RedisKey) -> EventLoopFuture<[RESPValue]>

Parameters

key

The key of the hash.

Return Value

A list of all values stored in a hash.

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                    hvals(in:as:)

Extension method

Gets all values stored in a hash.

See https://redis.io/commands/hvals

Declaration

Swift

@inlinable
public func hvals<Value>(in key: RedisKey, as type: Value.Type) -> EventLoopFuture<[Value?]> where Value : RESPValueConvertible

Parameters

`key`	The key of the hash.
`type`	The type to convert the values to.

Return Value

A list of all values stored in a hash.

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                    hscan(_:startingFrom:matching:count:valueType:)

Extension method

Incrementally iterates over all fields in a hash.

https://redis.io/commands/scan

Declaration

Swift

@inlinable
public func hscan<Value: RESPValueConvertible>(
    _ key: RedisKey,
    startingFrom position: Int = 0,
    matching match: String? = nil,
    count: Int? = nil,
    valueType: Value.Type
) -> EventLoopFuture<(Int, [String: Value?])>

Parameters

`key`	The key of the hash.
`position`	The position to start the scan from.
`match`	A glob-style pattern to filter values to be selected from the result set.
`count`	The number of elements to advance by. Redis default is 10.
`valueType`	The type to cast all values to.

Return Value

A cursor position for additional invocations with a limited collection of found fields and their values.

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                    hscan(_:startingFrom:matching:count:)

Extension method

Incrementally iterates over all fields in a hash.

https://redis.io/commands/scan

Declaration

Swift

public func hscan(
    _ key: RedisKey,
    startingFrom position: Int = 0,
    matching match: String? = nil,
    count: Int? = nil
) -> EventLoopFuture<(Int, [String: RESPValue])>

Parameters

`key`	The key of the hash.
`position`	The position to start the scan from.
`match`	A glob-style pattern to filter values to be selected from the result set.
`count`	The number of elements to advance by. Redis default is 10.

Return Value

A cursor position for additional invocations with a limited collection of found fields and their values.

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Set


                    
                    
                    hset(_:to:in:)

Extension method

Sets a hash field to the value specified.

Note

If you do not want to overwrite existing values, use hsetnx(_:field:to:).

See https://redis.io/commands/hset

Declaration

Swift

@inlinable
public func hset<Value: RESPValueConvertible>(
    _ field: String,
    to value: Value,
    in key: RedisKey
) -> EventLoopFuture<Bool>

Parameters

`field`	The name of the field in the hash being set.
`value`	The value the hash field should be set to.
`key`	The key that holds the hash.

Return Value

true if the hash was created, false if it was updated.

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                    hsetnx(_:to:in:)

Extension method

Sets a hash field to the value specified only if the field does not currently exist.

Note

If you do not care about overwriting existing values, use hset(_:field:to:).

See https://redis.io/commands/hsetnx

Declaration

Swift

@inlinable
public func hsetnx<Value: RESPValueConvertible>(
    _ field: String,
    to value: Value,
    in key: RedisKey
) -> EventLoopFuture<Bool>

Parameters

`field`	The name of the field in the hash being set.
`value`	The value the hash field should be set to.
`key`	The key that holds the hash.

Return Value

true if the hash was created.

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                    hmset(_:in:)

Extension method

Sets the fields in a hash to the respective values provided.

See https://redis.io/commands/hmset

Declaration

Swift

@inlinable
public func hmset<Value: RESPValueConvertible>(
    _ fields: [String: Value],
    in key: RedisKey
) -> EventLoopFuture<Void>

Parameters

`fields`	The key-value pair of field names and their respective values to set.
`key`	The key that holds the hash.

Return Value

An EventLoopFuture that resolves when the operation has succeeded, or fails with a RedisError.

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Get


                    
                    
                    hget(_:from:)

Extension method

Gets a hash field’s value.

See https://redis.io/commands/hget

Declaration

Swift

public func hget(_ field: String, from key: RedisKey) -> EventLoopFuture<RESPValue>

Parameters

`field`	The name of the field whose value is being accessed.
`key`	The key of the hash being accessed.

Return Value

The value of the hash field. If the key or field does not exist, it will be .null.

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                    hget(_:from:as:)

Extension method

Gets a hash field’s value as the desired type.

See https://redis.io/commands/hget

Declaration

Swift

@inlinable
public func hget<Value: RESPValueConvertible>(
    _ field: String,
    from key: RedisKey,
    as type: Value.Type
) -> EventLoopFuture<Value?>

Parameters

`field`	The name of the field whose value is being accessed.
`key`	The key of the hash being accessed.
`type`	The type to convert the value to.

Return Value

The value of the hash field, or nil if the RESPValue conversion fails or either the key or field does not exist.

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                    hmget(_:from:)

Extension method

Gets the values of a hash for the fields specified.

See https://redis.io/commands/hmget

Declaration

Swift

public func hmget(_ fields: [String], from key: RedisKey) -> EventLoopFuture<[RESPValue]>

Parameters

`fields`	A list of field names to get values for.
`key`	The key of the hash being accessed.

Return Value

A list of values in the same order as the fields argument. Non-existent fields return .null values.

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                    hmget(_:from:as:)

Extension method

Gets the values of a hash for the fields specified as a specific type.

See https://redis.io/commands/hmget

Declaration

Swift

@inlinable
public func hmget<Value: RESPValueConvertible>(
    _ fields: [String],
    from key: RedisKey,
    as type: Value.Type
) -> EventLoopFuture<[Value?]>

Parameters

`fields`	A list of field names to get values for.
`key`	The key of the hash being accessed.
`type`	The type to convert the values to.

Return Value

A list of values in the same order as the fields argument. Non-existent fields and elements that fail the RESPValue conversion return nil values.

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                    hmget(_:from:)

Extension method

Gets the values of a hash for the fields specified.

See https://redis.io/commands/hmget

Declaration

Swift

public func hmget(_ fields: String..., from key: RedisKey) -> EventLoopFuture<[RESPValue]>

Parameters

`fields`	A list of field names to get values for.
`key`	The key of the hash being accessed.

Return Value

A list of values in the same order as the fields argument. Non-existent fields return .null values.

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                    hmget(_:from:as:)

Extension method

Gets the values of a hash for the fields specified.

See https://redis.io/commands/hmget

Declaration

Swift

@inlinable
public func hmget<Value: RESPValueConvertible>(
    _ fields: String...,
    from key: RedisKey,
    as type: Value.Type
) -> EventLoopFuture<[Value?]>

Parameters

`fields`	A list of field names to get values for.
`key`	The key of the hash being accessed.
`type`	The type to convert the values to.

Return Value

A list of values in the same order as the fields argument. Non-existent fields and elements that fail the RESPValue conversion return nil values.

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                    hgetall(from:)

Extension method

Returns all the fields and values stored in a hash.

See https://redis.io/commands/hgetall

Declaration

Swift

public func hgetall(from key: RedisKey) -> EventLoopFuture<[String : RESPValue]>

Parameters

key

The key of the hash to pull from.

Return Value

A key-value pair list of fields and their values.

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                    hgetall(from:as:)

Extension method

Returns all the fields and values stored in a hash.

See https://redis.io/commands/hgetall

Declaration

Swift

@inlinable
public func hgetall<Value: RESPValueConvertible>(
    from key: RedisKey,
    as type: Value.Type
) -> EventLoopFuture<[String: Value?]>

Parameters

`key`	The key of the hash to pull from.
`type`	The type to convert the values to.

Return Value

A key-value pair list of fields and their values. Elements that fail the RESPValue conversion will be nil.

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Increment


                    
                    
                    hincrby(_:field:in:)

Extension method

Increments a hash field’s value and returns the new value.

See https://redis.io/commands/hincrby

Declaration

Swift

@inlinable
public func hincrby<Value: FixedWidthInteger & RESPValueConvertible>(
    _ amount: Value,
    field: String,
    in key: RedisKey
) -> EventLoopFuture<Value>

Parameters

`amount`	The amount to increment the value stored in the field by.
`field`	The name of the field whose value should be incremented.
`key`	The key of the hash the field is stored in.

Return Value

The new value of the hash field.

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                    hincrbyfloat(_:field:in:)

Extension method

Increments a hash field’s value and returns the new value.

See https://redis.io/commands/hincrbyfloat

Declaration

Swift

@inlinable
public func hincrbyfloat<Value: BinaryFloatingPoint & RESPValueConvertible>(
    _ amount: Value,
    field: String,
    in key: RedisKey
) -> EventLoopFuture<Value>

Parameters

`amount`	The amount to increment the value stored in the field by.
`field`	The name of the field whose value should be incremented.
`key`	The key of the hash the field is stored in.

Return Value

The new value of the hash field.

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General


                    
                    
                    llen(of:)

Extension method

Gets the length of a list.

See https://redis.io/commands/llen

Declaration

Swift

public func llen(of key: RedisKey) -> EventLoopFuture<Int>

Parameters

key

The key of the list.

Return Value

The number of elements in the list.

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                    lindex(_:from:)

Extension method

Gets the element from a list stored at the provided index position.

See https://redis.io/commands/lindex

Declaration

Swift

public func lindex(_ index: Int, from key: RedisKey) -> EventLoopFuture<RESPValue>

Parameters

`index`	The 0-based index of the element to get.
`key`	The key of the list.

Return Value

The element stored at index, or .null if out of bounds.

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                    lindex(_:from:as:)

Extension method

Gets the element from a list stored at the provided index position.

See https://redis.io/commands/lindex

Declaration

Swift

@inlinable
public func lindex<Value: RESPValueConvertible>(
    _ index: Int,
    from key: RedisKey,
    as type: Value.Type
) -> EventLoopFuture<Value?>

Parameters

`index`	The 0-based index of the element to get.
`key`	The key of the list.
`type`	The type to convert the value to.

Return Value

The element stored at index. If the value fails the RESPValue conversion or if the index is out of bounds, the returned value will be nil.

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                    lset(index:to:in:)

Extension method

Sets the value of an element in a list at the provided index position.

See https://redis.io/commands/lset

Declaration

Swift

@inlinable
public func lset<Value: RESPValueConvertible>(
    index: Int,
    to value: Value,
    in key: RedisKey
) -> EventLoopFuture<Void>

Parameters

`index`	The 0-based index of the element to set.
`value`	The new value the element should be.
`key`	The key of the list to update.

Return Value

An EventLoopFuture that resolves when the operation has succeeded, or fails with a RedisError.

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                    lrem(_:from:count:)

Extension method

Removes elements from a list matching the value provided.

See https://redis.io/commands/lrem

Declaration

Swift

@inlinable
public func lrem<Value: RESPValueConvertible>(
    _ value: Value,
    from key: RedisKey,
    count: Int = 0
) -> EventLoopFuture<Int>

Parameters

`value`	The value to delete from the list.
`key`	The key of the list to remove from.
`count`	The max number of elements to remove matching the value. See Redis’ documentation for more info.

Return Value

The number of elements removed from the list.

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LTrim


                    
                    
                    ltrim(_:before:after:)

Extension method

Trims a List to only contain elements within the specified inclusive bounds of 0-based indices.

See https://redis.io/commands/ltrim

Declaration

Swift

public func ltrim(_ key: RedisKey, before start: Int, after stop: Int) -> EventLoopFuture<Void>

Parameters

`key`	The key of the List to trim.
`start`	The index of the first element to keep.
`stop`	The index of the last element to keep.

Return Value

A NIO.EventLoopFuture that resolves when the operation has succeeded, or fails with a RedisError.

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                    ltrim(_:keepingIndices:)

Extension method

Trims a List to only contain elements within the specified inclusive bounds of 0-based indices.

To keep elements 4 through 7:

client.ltrim("myList", keepingIndices: 3...6)

To keep the last 4 through 7 elements:

client.ltrim("myList", keepingIndices: (-7)...(-4))

To keep the first and last 4 elements:

client.ltrim("myList", keepingIndices: (-4)...3)

See https://redis.io/commands/ltrim

Warning

A ClosedRange cannot be created where upperBound is less than lowerBound; so while Redis may support 0...-1, ClosedRange will trigger a precondition failure.

If you need such a range, use ltrim(_:before:after:) instead.

Declaration

Swift

public func ltrim(_ key: RedisKey, keepingIndices range: ClosedRange<Int>) -> EventLoopFuture<Void>

Parameters

`key`	The key of the List to trim.
`range`	The range of indices that should be kept in the List.

Return Value

A NIO.EventLoopFuture that resolves when the operation has succeeded, or fails with a RedisError.

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                    ltrim(_:keepingIndices:)

Extension method

Trims a List to only contain elements starting from the specified index.

To keep all but the first 3 elements:

client.ltrim("myList", keepingIndices: 3...)

To keep the last 4 elements:

client.ltrim("myList", keepingIndices: (-4)...)

See https://redis.io/commands/ltrim

Declaration

Swift

public func ltrim(_ key: RedisKey, keepingIndices range: PartialRangeFrom<Int>) -> EventLoopFuture<Void>

Parameters

`key`	The key of the List to trim.
`range`	The range of indices that should be kept in the List.

Return Value

A NIO.EventLoopFuture that resolves when the operation has succeeded, or fails with a RedisError.

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                    ltrim(_:keepingIndices:)

Extension method

Trims a List to only contain elements before the specified index.

To keep the first 3 elements:

client.ltrim("myList", keepingIndices: ..<3)

To keep all but the last 4 elements:

client.ltrim("myList", keepingIndices: ..<(-4))

See https://redis.io/commands/ltrim

Declaration

Swift

public func ltrim(_ key: RedisKey, keepingIndices range: PartialRangeUpTo<Int>) -> EventLoopFuture<Void>

Parameters

`key`	The key of the List to trim.
`range`	The range of indices that should be kept in the List.

Return Value

A NIO.EventLoopFuture that resolves when the operation has succeeded, or fails with a RedisError.

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                    ltrim(_:keepingIndices:)

Extension method

Trims a List to only contain elements up to the specified index.

To keep the first 4 elements:

client.ltrim("myList", keepingIndices: ...3)

To keep all but the last 3 elements:

client.ltrim("myList", keepingIndices: ...(-4))

See https://redis.io/commands/ltrim

Declaration

Swift

public func ltrim(_ key: RedisKey, keepingIndices range: PartialRangeThrough<Int>) -> EventLoopFuture<Void>

Parameters

`key`	The key of the List to trim.
`range`	The range of indices that should be kept in the List.

Return Value

A NIO.EventLoopFuture that resolves when the operation has succeeded, or fails with a RedisError.

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                    ltrim(_:keepingIndices:)

Extension method

Trims a List to only contain the elements from the specified index up to the index provided.

To keep the first 4 elements:

client.ltrim("myList", keepingIndices: 0..<4)

To keep all but the last 3 elements:

client.ltrim("myList", keepingIndices: 0..<(-3))

See https://redis.io/commands/ltrim

Warning

A Range cannot be created where upperBound is less than lowerBound; so while Redis may support 0..<(-1), Range will trigger a precondition failure.

If you need such a range, use ltrim(_:before:after:) instead.

Declaration

Swift

public func ltrim(_ key: RedisKey, keepingIndices range: Range<Int>) -> EventLoopFuture<Void>

Parameters

`key`	The key of the List to trim.
`range`	The range of indices that should be kept in the List.

Return Value

A NIO.EventLoopFuture that resolves when the operation has succeeded, or fails with a RedisError.

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LRange


                    
                    
                    lrange(from:firstIndex:lastIndex:)

Extension method

Gets all elements from a List within the the specified inclusive bounds of 0-based indices.

See https://redis.io/commands/lrange

Declaration

Swift

public func lrange(from key: RedisKey, firstIndex: Int, lastIndex: Int) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the List.
`firstIndex`	The index of the first element to include in the range of elements returned.
`lastIndex`	The index of the last element to include in the range of elements returned.

Return Value

An array of elements found within the range specified.

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                    lrange(from:firstIndex:lastIndex:as:)

Extension method

Gets all elements from a List within the the specified inclusive bounds of 0-based indices.

See https://redis.io/commands/lrange

Declaration

Swift

@inlinable
public func lrange<Value: RESPValueConvertible>(
    from key: RedisKey,
    firstIndex: Int,
    lastIndex: Int,
    as type: Value.Type
) -> EventLoopFuture<[Value?]>

Parameters

`key`	The key of the List.
`firstIndex`	The index of the first element to include in the range of elements returned.
`lastIndex`	The index of the last element to include in the range of elements returned.
`type`	The type to convert the values to.

Return Value

An array of elements found within the range specified, otherwise nil if the RESPValue conversion failed.

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                    lrange(from:indices:)

Extension method

Gets all elements from a List within the specified inclusive bounds of 0-based indices.

To get the elements at index 4 through 7:

client.lrange(from: "myList", indices: 4...7)

To get the last 4 elements:

client.lrange(from: "myList", indices: (-4)...(-1))

To get the first and last 4 elements:

client.lrange(from: "myList", indices: (-4)...3)

To get the first element, and the last 4:

client.lrange(from: "myList", indices: (-4)...0))

See https://redis.io/commands/lrange

Warning

A ClosedRange cannot be created where upperBound is less than lowerBound; so while Redis may support 0...-1, ClosedRange will trigger a precondition failure.

If you need such a range, use lrange(from:firstIndex:lastIndex:) instead.

Declaration

Swift

public func lrange(from key: RedisKey, indices range: ClosedRange<Int>) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the List to return elements from.
`range`	The range of inclusive indices of elements to get.

Return Value

An array of elements found within the range specified.

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                    lrange(from:indices:as:)

Extension method

Gets all elements from a List within the specified inclusive bounds of 0-based indices.

See https://redis.io/commands/lrange.

Warning

A ClosedRange cannot be created where upperBound is less than lowerBound; so while Redis may support 0...-1, ClosedRange will trigger a precondition failure.

If you need such a range, use lrange(from:firstIndex:lastIndex:) instead.

Declaration

Swift

@inlinable
public func lrange<Value: RESPValueConvertible>(
    from key: RedisKey,
    indices range: ClosedRange<Int>,
    as type: Value.Type
) -> EventLoopFuture<[Value?]>

Parameters

`key`	The key of the List to return elements from.
`range`	The range of inclusive indices of elements to get.
`type`	The type to convert the values to.

Return Value

An array of elements found within the range specified, otherwise nil if the RESPValue conversion failed.

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                    lrange(from:indices:)

Extension method

Gets all the elements from a List starting with the first index bound up to, but not including, the element at the last index bound.

To get the elements at index 4 through 7:

client.lrange(from: "myList", indices: 4..<8)

To get the last 4 elements:

client.lrange(from: "myList", indices: (-4)..<0)

To get the first and last 4 elements:

client.lrange(from: "myList", indices: (-4)..<4)

To get the first element, and the last 4:

client.lrange(from: "myList", indices: (-4)..<1)

See https://redis.io/commands/lrange

Warning

A Range cannot be created where upperBound is less than lowerBound; so while Redis may support 0..<(-1), Range will trigger a precondition failure.

If you need such a range, use lrange(from:firstIndex:lastIndex:) instead.

Declaration

Swift

public func lrange(from key: RedisKey, indices range: Range<Int>) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the List to return elements from.
`range`	The range of indices (inclusive lower, exclusive upper) elements to get.

Return Value

An array of elements found within the range specified.

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                    lrange(from:indices:as:)

Extension method

Gets all the elements from a List starting with the first index bound up to, but not including, the element at the last index bound.

See https://redis.io/commands/lrange

Warning

A Range cannot be created where upperBound is less than lowerBound; so while Redis may support 0..<(-1), Range will trigger a precondition failure.

If you need such a range, use lrange(from:firstIndex:lastIndex:) instead.

Declaration

Swift

@inlinable
public func lrange<Value: RESPValueConvertible>(
    from key: RedisKey,
    indices range: Range<Int>,
    as type: Value.Type
) -> EventLoopFuture<[Value?]>

Parameters

`key`	The key of the List to return elements from.
`range`	The range of indices (inclusive lower, exclusive upper) elements to get.
`type`	The type to convert the values to.

Return Value

An array of elements found within the range specified, otherwise nil if the RESPValue conversion failed.

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                    lrange(from:fromIndex:)

Extension method

Gets all elements from the index specified to the end of a List.

To get all except the first 2 elements of a List:

client.lrange(from: "myList", fromIndex: 2)

To get the last 4 elements of a List:

client.lrange(from: "myList", fromIndex: -4)

See lrange(from:indices:), lrange(from:firstIndex:lastIndex:), and https://redis.io/commands/lrange

Declaration

Swift

public func lrange(from key: RedisKey, fromIndex index: Int) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the List to return elements from.
`index`	The index of the first element that will be in the returned values.

Return Value

An array of elements from the List between the index and the end.

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                    lrange(from:fromIndex:as:)

Extension method

Gets all elements from the index specified to the end of a List.

See lrange(from:indices:), lrange(from:firstIndex:lastIndex:), and https://redis.io/commands/lrange

Declaration

Swift

@inlinable
public func lrange<Value: RESPValueConvertible>(
    from key: RedisKey,
    fromIndex index: Int,
    as type: Value.Type
) -> EventLoopFuture<[Value?]>

Parameters

`key`	The key of the List to return elements from.
`index`	The index of the first element that will be in the returned values.
`type`	The type to convert the values to.

Return Value

An array of elements from the List between the index and the end, otherwise nil if the RESPValue conversion failed.

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                    lrange(from:throughIndex:)

Extension method

Gets all elements from the the start of a List up to, and including, the element at the index specified.

To get the first 3 elements of a List:

client.lrange(from: "myList", throughIndex: 2)

To get all except the last 3 elements of a List:

client.lrange(from: "myList", throughIndex: -4)

See lrange(from:indices:), lrange(from:firstIndex:lastIndex:), and https://redis.io/commands/lrange

Declaration

Swift

public func lrange(from key: RedisKey, throughIndex index: Int) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the List to return elements from.
`index`	The index of the last element that will be in the returned values.

Return Value

An array of elements from the start of a List to the index.

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                    lrange(from:throughIndex:as:)

Extension method

Gets all elements from the the start of a List up to, and including, the element at the index specified.

See lrange(from:indices:), lrange(from:firstIndex:lastIndex:), and https://redis.io/commands/lrange

Declaration

Swift

@inlinable
public func lrange<Value: RESPValueConvertible>(
    from key: RedisKey,
    throughIndex index: Int,
    as type: Value.Type
) -> EventLoopFuture<[Value?]>

Parameters

`key`	The key of the List to return elements from.
`index`	The index of the last element that will be in the returned values.
`type`	The type to convert the values to.

Return Value

An array of elements from the start of a List to the index, otherwise nil if the RESPValue conversion failed.

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                    lrange(from:upToIndex:)

Extension method

Gets all elements from the the start of a List up to, but not including, the element at the index specified.

To get the first 3 elements of a List:

client.lrange(from: "myList", upToIndex: 3)

To get all except the last 3 elements of a List:

client.lrange(from: "myList", upToIndex: -3)

See lrange(from:indices:), lrange(from:firstIndex:lastIndex:), and https://redis.io/commands/lrange

Declaration

Swift

public func lrange(from key: RedisKey, upToIndex index: Int) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the List to return elements from.
`index`	The index of the element to not include in the returned values.

Return Value

An array of elements from the start of the List and up to the index.

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                    lrange(from:upToIndex:as:)

Extension method

Gets all elements from the the start of a List up to, but not including, the element at the index specified.

See lrange(from:indices:), lrange(from:firstIndex:lastIndex:), and https://redis.io/commands/lrange

Declaration

Swift

@inlinable
public func lrange<Value: RESPValueConvertible>(
    from key: RedisKey,
    upToIndex index: Int,
    as type: Value.Type
) -> EventLoopFuture<[Value?]>

Parameters

`key`	The key of the List to return elements from.
`index`	The index of the element to not include in the returned values.
`type`	The type to convert the values to.

Return Value

An array of elements from the start of the List and up to the index, otherwise nil if the RESPValue conversion failed.

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Pop & Push


                    
                    
                    rpoplpush(from:to:)

Extension method

Pops the last element from a source list and pushes it to a destination list.

See https://redis.io/commands/rpoplpush

Declaration

Swift

public func rpoplpush(from source: RedisKey, to dest: RedisKey) -> EventLoopFuture<RESPValue>

Parameters

`source`	The key of the list to pop from.
`dest`	The key of the list to push to.

Return Value

The element that was moved.

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                    rpoplpush(from:to:valueType:)

Extension method

Pops the last element from a source list and pushes it to a destination list.

See https://redis.io/commands/rpoplpush

Declaration

Swift

@inlinable
public func rpoplpush<Value: RESPValueConvertible>(
    from source: RedisKey,
    to dest: RedisKey,
    valueType: Value.Type
) -> EventLoopFuture<Value?>

Parameters

`source`	The key of the list to pop from.
`dest`	The key of the list to push to.
`type`	The type to convert the value to.

Return Value

The element that was moved. This value is nil if the RESPValue conversion failed.

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                    brpoplpush(from:to:timeout:)

Extension method

Pops the last element from a source list and pushes it to a destination list, blocking until an element is available from the source list.

Important

This will block the connection from completing further commands until an element is available to pop from the source list.

It is highly recommended to set a reasonable timeout or to use the non-blocking rpoplpush method where possible.

See https://redis.io/commands/brpoplpush

Declaration

Swift

public func brpoplpush(
    from source: RedisKey,
    to dest: RedisKey,
    timeout: TimeAmount = .seconds(0)
) -> EventLoopFuture<RESPValue>

Parameters

`source`	The key of the list to pop from.
`dest`	The key of the list to push to.
`timeout`	The max time to wait for a value to use. `0` seconds means to wait indefinitely.

Return Value

The element popped from the source list and pushed to the destination or .null if the timeout was reached.

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                    brpoplpush(from:to:timeout:valueType:)

Extension method

Pops the last element from a source list and pushes it to a destination list, blocking until an element is available from the source list.

Important

This will block the connection from completing further commands until an element is available to pop from the source list.

It is highly recommended to set a reasonable timeout or to use the non-blocking rpoplpush method where possible.

See https://redis.io/commands/brpoplpush

Declaration

Swift

@inlinable
public func brpoplpush<Value: RESPValueConvertible>(
    from source: RedisKey,
    to dest: RedisKey,
    timeout: TimeAmount = .seconds(0),
    valueType: Value.Type
) -> EventLoopFuture<Value?>

Parameters

`source`	The key of the list to pop from.
`dest`	The key of the list to push to.
`timeout`	The max time to wait for a value to use. `0` seconds means to wait indefinitely.
`type`	The type to convert the value to.

Return Value

The element popped from the source list and pushed to the destination. If the timeout was reached or RESPValue conversion failed, the returned value will be nil.

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Insert


                    
                    
                    linsert(_:into:before:)

Extension method

Inserts the element before the first element matching the “pivot” value specified.

See https://redis.io/commands/linsert

Declaration

Swift

@inlinable
public func linsert<Value: RESPValueConvertible>(
    _ element: Value,
    into key: RedisKey,
    before pivot: Value
) -> EventLoopFuture<Int>

Parameters

`element`	The value to insert into the list.
`key`	The key of the list.
`pivot`	The value of the element to insert before.

Return Value

The size of the list after the insert, or -1 if an element matching the pivot value was not found.

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                    linsert(_:into:after:)

Extension method

Inserts the element after the first element matching the “pivot” value provided.

See https://redis.io/commands/linsert

Declaration

Swift

@inlinable
public func linsert<Value: RESPValueConvertible>(
    _ element: Value,
    into key: RedisKey,
    after pivot: Value
) -> EventLoopFuture<Int>

Parameters

`element`	The value to insert into the list.
`key`	The key of the list.
`pivot`	The value of the element to insert after.

Return Value

The size of the list after the insert, or -1 if an element matching the pivot value was not found.

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Head Operations


                    
                    
                    lpop(from:)

Extension method

Removes the first element of a list.

See https://redis.io/commands/lpop

Declaration

Swift

public func lpop(from key: RedisKey) -> EventLoopFuture<RESPValue>

Parameters

key

The key of the list to pop from.

Return Value

The element that was popped from the list, or .null.

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                    lpop(from:as:)

Extension method

Removes the first element of a list.

See https://redis.io/commands/lpop

Declaration

Swift

@inlinable
public func lpop<Value>(from key: RedisKey, as type: Value.Type) -> EventLoopFuture<Value?> where Value : RESPValueConvertible

Parameters

`key`	The key of the list to pop from.
`type`	The type to convert the value to.

Return Value

The element that was popped from the list. If the list is empty or the RESPValue conversion failed, this value is nil.

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                    lpush(_:into:)

Extension method

Pushes all of the provided elements into a list.

Note

This inserts the elements at the head of the list; for the tail see rpush(_:into:).

See https://redis.io/commands/lpush

Declaration

Swift

@inlinable
public func lpush<Value>(_ elements: [Value], into key: RedisKey) -> EventLoopFuture<Int> where Value : RESPValueConvertible

Parameters

`elements`	The values to push into the list.
`key`	The key of the list.

Return Value

The length of the list after adding the new elements.

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                    lpush(_:into:)

Extension method

Pushes all of the provided elements into a list.

Note

This inserts the elements at the head of the list; for the tail see rpush(_:into:).

See https://redis.io/commands/lpush

Declaration

Swift

@inlinable
public func lpush<Value>(_ elements: Value..., into key: RedisKey) -> EventLoopFuture<Int> where Value : RESPValueConvertible

Parameters

`elements`	The values to push into the list.
`key`	The key of the list.

Return Value

The length of the list after adding the new elements.

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                    lpushx(_:into:)

Extension method

Pushes an element into a list, but only if the key exists and holds a list.

Note

This inserts the element at the head of the list, for the tail see rpushx(_:into:).

See https://redis.io/commands/lpushx

Declaration

Swift

@inlinable
public func lpushx<Value>(_ element: Value, into key: RedisKey) -> EventLoopFuture<Int> where Value : RESPValueConvertible

Parameters

`element`	The value to try and push into the list.
`key`	The key of the list.

Return Value

The length of the list after adding the new elements.

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Tail Operations


                    
                    
                    rpop(from:)

Extension method

Removes the last element a list.

See https://redis.io/commands/rpop

Declaration

Swift

public func rpop(from key: RedisKey) -> EventLoopFuture<RESPValue>

Parameters

key

The key of the list to pop from.

Return Value

The element that was popped from the list, else .null.

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                    rpop(from:as:)

Extension method

Removes the last element a list.

See https://redis.io/commands/rpop

Declaration

Swift

@inlinable
public func rpop<Value>(from key: RedisKey, as type: Value.Type) -> EventLoopFuture<Value?> where Value : RESPValueConvertible

Parameters

key

The key of the list to pop from.

Return Value

The element that was popped from the list. If the list is empty or the RESPValue conversion fails, this value is nil.

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rpush(_:into:) Extension method
Pushes all of the provided elements into a list.

Note
This inserts the elements at the tail of the list; for the head see lpush(_:into:).

See https://redis.io/commands/rpush - elements: The values to push into the list. - key: The key of the list.
Declaration
Swift

@inlinable public func rpush<Value>(_ elements: [Value], into key: RedisKey) -> EventLoopFuture<Int> where Value : RESPValueConvertible
Return Value

The length of the list after adding the new elements.

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rpush(_:into:) Extension method
Pushes all of the provided elements into a list.

Note
This inserts the elements at the tail of the list; for the head see lpush(_:into:).

See https://redis.io/commands/rpush - elements: The values to push into the list. - key: The key of the list.
Declaration
Swift

@inlinable public func rpush<Value>(_ elements: Value..., into key: RedisKey) -> EventLoopFuture<Int> where Value : RESPValueConvertible
Return Value

The length of the list after adding the new elements.

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                    rpushx(_:into:)

Extension method

Pushes an element into a list, but only if the key exists and holds a list.

Note

This inserts the element at the tail of the list; for the head see lpushx(_:into:).

See https://redis.io/commands/rpushx

Declaration

Swift

@inlinable
public func rpushx<Value>(_ element: Value, into key: RedisKey) -> EventLoopFuture<Int> where Value : RESPValueConvertible

Parameters

`element`	The value to try and push into the list.
`key`	The key of the list.

Return Value

The length of the list after adding the new elements.

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Blocking Pop


                    
                    
                    blpop(from:timeout:)

Extension method

Removes the first element of a list, blocking until an element is available.

Important

This will block the connection from completing further commands until an element is available to pop from the list.

It is highly recommended to set a reasonable timeout or to use the non-blocking lpop method where possible.

See https://redis.io/commands/blpop

Declaration

Swift

public func blpop(from key: RedisKey, timeout: TimeAmount = .seconds(0)) -> EventLoopFuture<RESPValue>

Parameters

`key`	The key of the list to pop from.
`timeout`	The max time to wait for a value to use. `0`seconds means to wait indefinitely.

Return Value

The element that was popped from the list, or .null if the timeout was reached.

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                    blpop(from:as:timeout:)

Extension method

Removes the first element of a list, blocking until an element is available.

Important

This will block the connection from completing further commands until an element is available to pop from the list.

It is highly recommended to set a reasonable timeout or to use the non-blocking lpop method where possible.

See https://redis.io/commands/blpop

Declaration

Swift

@inlinable
public func blpop<Value: RESPValueConvertible>(
    from key: RedisKey,
    as type: Value.Type,
    timeout: TimeAmount = .seconds(0)
) -> EventLoopFuture<Value?>

Parameters

`key`	The key of the list to pop from.
`type`	The type to convert the value to.
`timeout`	The max time to wait for a value to use. `0`seconds means to wait indefinitely.

Return Value

The element that was popped from the list. If the timeout was reached or RESPValue conversion failed, nil.

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                    blpop(from:timeout:)

Extension method

Removes the first element of a list, blocking until an element is available.

Important

This will block the connection from completing further commands until an element is available to pop from the group of lists.

It is highly recommended to set a reasonable timeout or to use the non-blocking lpop method where possible.

See https://redis.io/commands/blpop

Declaration

Swift

public func blpop(from keys: [RedisKey], timeout: TimeAmount = .seconds(0)) -> EventLoopFuture<(RedisKey, RESPValue)?>

Parameters

`keys`	The keys of lists in Redis that should be popped from.
`timeout`	The max time to wait for a value to use. `0`seconds means to wait indefinitely.

Return Value

If timeout was reached, nil.

Otherwise, the key of the list the element was removed from and the popped element.

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                    blpop(from:timeout:valueType:)

Extension method

Removes the first element of a list, blocking until an element is available.

Important

This will block the connection from completing further commands until an element is available to pop from the group of lists.

It is highly recommended to set a reasonable timeout or to use the non-blocking lpop method where possible.

See https://redis.io/commands/blpop

Declaration

Swift

@inlinable
public func blpop<Value: RESPValueConvertible>(
    from keys: [RedisKey],
    timeout: TimeAmount = .seconds(0),
    valueType: Value.Type
) -> EventLoopFuture<(RedisKey, Value)?>

Parameters

`keys`	The keys of lists in Redis that should be popped from.
`timeout`	The max time to wait for a value to use. `0`seconds means to wait indefinitely.
`valueType`	The type to convert the value to.

Return Value

If timeout was reached or the RESPValue conversion failed, nil.

Otherwise, the key of the list the element was removed from and the popped element.

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                    blpop(from:timeout:)

Extension method

Removes the first element of a list, blocking until an element is available.

Important

This will block the connection from completing further commands until an element is available to pop from the group of lists.

It is highly recommended to set a reasonable timeout or to use the non-blocking lpop method where possible.

See https://redis.io/commands/blpop

Declaration

Swift

public func blpop(from keys: RedisKey..., timeout: TimeAmount = .seconds(0)) -> EventLoopFuture<(RedisKey, RESPValue)?>

Parameters

`keys`	The keys of lists in Redis that should be popped from.
`timeout`	The max time to wait for a value to use. `0`seconds means to wait indefinitely.

Return Value

If timeout was reached, nil.

Otherwise, the key of the list the element was removed from and the popped element.

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                    blpop(from:timeout:valueType:)

Extension method

Removes the first element of a list, blocking until an element is available.

Important

This will block the connection from completing further commands until an element is available to pop from the group of lists.

It is highly recommended to set a reasonable timeout or to use the non-blocking lpop method where possible.

See https://redis.io/commands/blpop

Declaration

Swift

@inlinable
public func blpop<Value: RESPValueConvertible>(
    from keys: RedisKey...,
    timeout: TimeAmount = .seconds(0),
    valueType: Value.Type
) -> EventLoopFuture<(RedisKey, Value)?>

Parameters

`keys`	The keys of lists in Redis that should be popped from.
`timeout`	The max time to wait for a value to use. `0`seconds means to wait indefinitely.
`valueType`	The type to convert the value to.

Return Value

If timeout was reached or RESPValue conversion failed, nil.

Otherwise, the key of the list the element was removed from and the popped element.

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                    brpop(from:timeout:)

Extension method

Removes the last element of a list, blocking until an element is available.

Important

This will block the connection from completing further commands until an element is available to pop from the list.

It is highly recommended to set a reasonable timeout or to use the non-blocking rpop method where possible.

See https://redis.io/commands/brpop

Declaration

Swift

public func brpop(from key: RedisKey, timeout: TimeAmount = .seconds(0)) -> EventLoopFuture<RESPValue>

Parameters

`key`	The key of the list to pop from.
`timeout`	The max time to wait for a value to use. `0`seconds means to wait indefinitely.

Return Value

The element that was popped from the list, or .null if the timeout was reached.

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                    brpop(from:as:timeout:)

Extension method

Removes the last element of a list, blocking until an element is available.

Important

This will block the connection from completing further commands until an element is available to pop from the list.

It is highly recommended to set a reasonable timeout or to use the non-blocking rpop method where possible.

See https://redis.io/commands/brpop

Declaration

Swift

@inlinable
public func brpop<Value: RESPValueConvertible>(
    from key: RedisKey,
    as type: Value.Type,
    timeout: TimeAmount = .seconds(0)
) -> EventLoopFuture<Value?>

Parameters

`key`	The key of the list to pop from.
`type`	The type to convert the value to.
`timeout`	The max time to wait for a value to use. `0`seconds means to wait indefinitely.

Return Value

The element that was popped from the list. If the timeout was reached or the RESPValue conversion fails, this value is nil.

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                    brpop(from:timeout:)

Extension method

Removes the last element of a list, blocking until an element is available.

Important

This will block the connection from completing further commands until an element is available to pop from the group of lists.

It is highly recommended to set a reasonable timeout or to use the non-blocking rpop method where possible.

See https://redis.io/commands/brpop

Declaration

Swift

public func brpop(from keys: [RedisKey], timeout: TimeAmount = .seconds(0)) -> EventLoopFuture<(RedisKey, RESPValue)?>

Parameters

`keys`	The keys of lists in Redis that should be popped from.
`timeout`	The max time to wait for a value to use. `0`seconds means to wait indefinitely.

Return Value

If timeout was reached, nil.

Otherwise, the key of the list the element was removed from and the popped element.

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                    brpop(from:timeout:valueType:)

Extension method

Removes the last element of a list, blocking until an element is available.

Important

This will block the connection from completing further commands until an element is available to pop from the group of lists.

It is highly recommended to set a reasonable timeout or to use the non-blocking rpop method where possible.

See https://redis.io/commands/brpop

Declaration

Swift

@inlinable
public func brpop<Value: RESPValueConvertible>(
    from keys: [RedisKey],
    timeout: TimeAmount = .seconds(0),
    valueType: Value.Type
) -> EventLoopFuture<(RedisKey, Value)?>

Parameters

`keys`	The keys of lists in Redis that should be popped from.
`timeout`	The max time to wait for a value to use. `0`seconds means to wait indefinitely.

Return Value

If timeout was reached or RESPValue conversion failed, nil.

Otherwise, the key of the list the element was removed from and the popped element.

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                    brpop(from:timeout:)

Extension method

Removes the last element of a list, blocking until an element is available.

Important

This will block the connection from completing further commands until an element is available to pop from the group of lists.

It is highly recommended to set a reasonable timeout or to use the non-blocking rpop method where possible.

See https://redis.io/commands/brpop

Declaration

Swift

public func brpop(from keys: RedisKey..., timeout: TimeAmount = .seconds(0)) -> EventLoopFuture<(RedisKey, RESPValue)?>

Parameters

`keys`	The keys of lists in Redis that should be popped from.
`timeout`	The max time to wait for a value to use. `0`seconds means to wait indefinitely.

Return Value

If timeout was reached, nil.

Otherwise, the key of the list the element was removed from and the popped element.

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                    brpop(from:timeout:valueType:)

Extension method

Removes the last element of a list, blocking until an element is available.

Important

This will block the connection from completing further commands until an element is available to pop from the group of lists.

It is highly recommended to set a reasonable timeout or to use the non-blocking rpop method where possible.

See https://redis.io/commands/brpop

Declaration

Swift

@inlinable
public func brpop<Value: RESPValueConvertible>(
    from keys: RedisKey...,
    timeout: TimeAmount = .seconds(0),
    valueType: Value.Type
) -> EventLoopFuture<(RedisKey, Value)?>

Parameters

`keys`	The keys of lists in Redis that should be popped from.
`timeout`	The max time to wait for a value to use. `0`seconds means to wait indefinitely.

Return Value

If timeout was reached or RESPValue conversion failed, nil.

Otherwise, the key of the list the element was removed from and the popped element.

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Publish


                    
                    
                    publish(_:to:)

Extension method

Publishes the provided message to a specific Redis channel.

See PUBLISH

Declaration

Swift

@discardableResult
@inlinable
public func publish<Message: RESPValueConvertible>(
    _ message: Message,
    to channel: RedisChannelName
) -> EventLoopFuture<Int>

Parameters

`message`	The “message” value to publish on the channel.
`channel`	The name of the channel to publish the message to.

Return Value

The number of subscribed clients that received the message.

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PubSub Sub-commands


                    
                    
                    activeChannels(matching:)

Extension method

Resolves a list of all the channels that have at least 1 (non-pattern) subscriber.

See PUBSUB CHANNELS

Note

If no match pattern is provided, all active channels will be returned.

Declaration

Swift

public func activeChannels(matching match: String? = nil) -> EventLoopFuture<[RedisChannelName]>

Parameters


                                match

An optional pattern of channel names to filter for.

Return Value

A list of all active channel names.

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patternSubscriberCount() Extension method
Resolves the total count of active subscriptions to channels that were made using patterns.

See PUBSUB NUMPAT
Declaration
Swift

public func patternSubscriberCount() -> EventLoopFuture<Int>
Return Value

The total count of subscriptions made through patterns.

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                    subscriberCount(forChannels:)

Extension method

Resolves a count of (non-pattern) subscribers for each given channel.

See PUBSUB NUMSUB

Declaration

Swift

public func subscriberCount(forChannels channels: [RedisChannelName]) -> EventLoopFuture<[RedisChannelName : Int]>

Parameters


                                channels

A list of channel names to collect the subscriber counts for.

Return Value

A mapping of channel names and their (non-pattern) subscriber count.

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General


                    
                    
                    smembers(of:)

Extension method

Gets all of the elements contained in a set.

Note

Ordering of results are stable between multiple calls of this method to the same set.

Results are UNSTABLE in regards to the ordering of insertions through the sadd command and this method.

See https://redis.io/commands/smembers

Declaration

Swift

public func smembers(of key: RedisKey) -> EventLoopFuture<[RESPValue]>

Parameters

key

The key of the set.

Return Value

A list of elements found within the set.

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                    smembers(of:as:)

Extension method

Gets all of the elements contained in a set.

Note

Ordering of results are stable between multiple calls of this method to the same set.

Results are UNSTABLE in regards to the ordering of insertions through the sadd command and this method.

See https://redis.io/commands/smembers

Declaration

Swift

@inlinable
public func smembers<Value>(of key: RedisKey, as type: Value.Type) -> EventLoopFuture<[Value?]> where Value : RESPValueConvertible

Parameters

`key`	The key of the set.
`type`	The type to convert the values to.

Return Value

A list of elements found within the set. Elements that fail the RESPValue conversion will be nil.

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                    sismember(_:of:)

Extension method

Checks if the element is included in a set.

See https://redis.io/commands/sismember

Declaration

Swift

@inlinable
public func sismember<Value>(_ element: Value, of key: RedisKey) -> EventLoopFuture<Bool> where Value : RESPValueConvertible

Parameters

`element`	The element to look for in the set.
`key`	The key of the set to look in.

Return Value

true if the element is in the set.

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                    scard(of:)

Extension method

Gets the total count of elements within a set.

See https://redis.io/commands/scard

Declaration

Swift

public func scard(of key: RedisKey) -> EventLoopFuture<Int>

Parameters

key

The key of the set.

Return Value

The total count of elements in the set.

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                    sadd(_:to:)

Extension method

Adds elements to a set.

See https://redis.io/commands/sadd

Declaration

Swift

@inlinable
public func sadd<Value>(_ elements: [Value], to key: RedisKey) -> EventLoopFuture<Int> where Value : RESPValueConvertible

Parameters

`elements`	The values to add to the set.
`key`	The key of the set to insert into.

Return Value

The number of elements that were added to the set.

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                    sadd(_:to:)

Extension method

Adds elements to a set.

See https://redis.io/commands/sadd

Declaration

Swift

@inlinable
public func sadd<Value>(_ elements: Value..., to key: RedisKey) -> EventLoopFuture<Int> where Value : RESPValueConvertible

Parameters

`elements`	The values to add to the set.
`key`	The key of the set to insert into.

Return Value

The number of elements that were added to the set.

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                    srem(_:from:)

Extension method

Removes elements from a set.

See https://redis.io/commands/srem

Declaration

Swift

@inlinable
public func srem<Value>(_ elements: [Value], from key: RedisKey) -> EventLoopFuture<Int> where Value : RESPValueConvertible

Parameters

`elements`	The values to remove from the set.
`key`	The key of the set to remove from.

Return Value

The number of elements that were removed from the set.

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                    srem(_:from:)

Extension method

Removes elements from a set.

See https://redis.io/commands/srem

Declaration

Swift

@inlinable
public func srem<Value>(_ elements: Value..., from key: RedisKey) -> EventLoopFuture<Int> where Value : RESPValueConvertible

Parameters

`elements`	The values to remove from the set.
`key`	The key of the set to remove from.

Return Value

The number of elements that were removed from the set.

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                    spop(from:max:)

Extension method

Randomly selects and removes one or more elements in a set.

See https://redis.io/commands/spop

Declaration

Swift

public func spop(from key: RedisKey, max count: Int = 1) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the set.
`count`	The max number of elements to pop from the set.

Return Value

The element that was popped from the set.

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                    spop(from:as:max:)

Extension method

Randomly selects and removes one or more elements in a set.

See https://redis.io/commands/spop

Declaration

Swift

@inlinable
public func spop<Value: RESPValueConvertible>(
    from key: RedisKey,
    as type: Value.Type,
    max count: Int = 1
) -> EventLoopFuture<[Value?]>

Parameters

`key`	The key of the set.
`type`	The type to convert the values to.
`count`	The max number of elements to pop from the set.

Return Value

The element that was popped from the set. Elements that fail the RESPValue conversion will be nil.

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                    srandmember(from:max:)

Extension method

Randomly selects one or more elements in a set.

connection.srandmember("my_key") // pulls just one random element
connection.srandmember("my_key", max: -3) // pulls up to 3 elements, allowing duplicates
connection.srandmember("my_key", max: 3) // pulls up to 3 elements, guaranteed unique

See https://redis.io/commands/srandmember

Declaration

Swift

public func srandmember(from key: RedisKey, max count: Int = 1) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the set.
`count`	The max number of elements to select from the set.

Return Value

The elements randomly selected from the set.

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                    srandmember(from:as:max:)

Extension method

Randomly selects one or more elements in a set.

See https://redis.io/commands/srandmember

Declaration

Swift

@inlinable
public func srandmember<Value: RESPValueConvertible>(
    from key: RedisKey,
    as type: Value.Type,
    max count: Int = 1
) -> EventLoopFuture<[Value?]>

Parameters

`key`	The key of the set.
`count`	The max number of elements to select from the set.

Return Value

The elements randomly selected from the set. Elements that fail the RESPValue conversion will be nil.

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                    smove(_:from:to:)

Extension method

Moves an element from one set to another.

See https://redis.io/commands/smove

Declaration

Swift

@inlinable
public func smove<Value: RESPValueConvertible>(
    _ element: Value,
    from sourceKey: RedisKey,
    to destKey: RedisKey
) -> EventLoopFuture<Bool>

Parameters

`element`	The value to move from the source.
`sourceKey`	The key of the source set.
`destKey`	The key of the destination set.

Return Value

true if the element was successfully removed from the source set.

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                    sscan(_:startingFrom:matching:count:)

Extension method

Incrementally iterates over all values in a set.

See https://redis.io/commands/sscan

Declaration

Swift

public func sscan(
    _ key: RedisKey,
    startingFrom position: Int = 0,
    matching match: String? = nil,
    count: Int? = nil
) -> EventLoopFuture<(Int, [RESPValue])>

Parameters

`key`	The key of the set.
`position`	The position to start the scan from.
`count`	The number of elements to advance by. Redis default is 10.
`match`	A glob-style pattern to filter values to be selected from the result set.

Return Value

A cursor position for additional invocations with a limited collection of elements found in the set.

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                    sscan(_:startingFrom:matching:count:valueType:)

Extension method

Incrementally iterates over all values in a set.

See https://redis.io/commands/sscan

Declaration

Swift

@inlinable
public func sscan<Value: RESPValueConvertible>(
    _ key: RedisKey,
    startingFrom position: Int = 0,
    matching match: String? = nil,
    count: Int? = nil,
    valueType: Value.Type
) -> EventLoopFuture<(Int, [Value?])>

Parameters

`key`	The key of the set.
`position`	The position to start the scan from.
`match`	A glob-style pattern to filter values to be selected from the result set.
`count`	The number of elements to advance by. Redis default is 10.
`valueType`	The type to convert the value to.

Return Value

A cursor position for additional invocations with a limited collection of elements found in the set. Elements that fail the RESPValue conversion will be nil.

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Diff


                    
                    
                    sdiff(of:)

Extension method

Calculates the difference between two or more sets.

See https://redis.io/commands/sdiff

Declaration

Swift

public func sdiff(of keys: [RedisKey]) -> EventLoopFuture<[RESPValue]>

Parameters


                                keys

The source sets to calculate the difference of.

Return Value

A list of elements resulting from the difference.

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                    sdiff(of:valueType:)

Extension method

Calculates the difference between two or more sets.

See https://redis.io/commands/sdiff

Declaration

Swift

@inlinable
public func sdiff<Value>(of keys: [RedisKey], valueType: Value.Type) -> EventLoopFuture<[Value?]> where Value : RESPValueConvertible

Parameters

`keys`	The source sets to calculate the difference of.
`valueType`	The type to convert the values to.

Return Value

A list of elements resulting from the difference. Elements that fail the RESPValue conversion will be nil.

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                    sdiff(of:)

Extension method

Calculates the difference between two or more sets.

See https://redis.io/commands/sdiff

Declaration

Swift

public func sdiff(of keys: RedisKey...) -> EventLoopFuture<[RESPValue]>

Parameters


                                keys

The source sets to calculate the difference of.

Return Value

A list of elements resulting from the difference.

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                    sdiff(of:valueType:)

Extension method

Calculates the difference between two or more sets.

See https://redis.io/commands/sdiff

Declaration

Swift

@inlinable
public func sdiff<Value>(of keys: RedisKey..., valueType: Value.Type) -> EventLoopFuture<[Value?]> where Value : RESPValueConvertible

Parameters

`keys`	The source sets to calculate the difference of.
`valueType`	The type to convert the values to.

Return Value

A list of elements resulting from the difference. Elements that fail the RESPValue conversion will be nil.

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                    sdiffstore(as:sources:)

Extension method

Calculates the difference between two or more sets and stores the result.

Important

If the destination key already exists, it is overwritten.

See https://redis.io/commands/sdiffstore

Declaration

Swift

public func sdiffstore(as destination: RedisKey, sources keys: [RedisKey]) -> EventLoopFuture<Int>

Parameters

`destination`	The key of the new set from the result.
`sources`	The list of source sets to calculate the difference of.

Return Value

The number of elements in the difference result.

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Intersect


                    
                    
                    sinter(of:)

Extension method

Calculates the intersection of two or more sets.

See https://redis.io/commands/sinter

Declaration

Swift

public func sinter(of keys: [RedisKey]) -> EventLoopFuture<[RESPValue]>

Parameters


                                keys

The source sets to calculate the intersection of.

Return Value

A list of elements resulting from the intersection.

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                    sinter(of:valueType:)

Extension method

Calculates the intersection of two or more sets.

See https://redis.io/commands/sinter

Declaration

Swift

@inlinable
public func sinter<Value>(of keys: [RedisKey], valueType: Value.Type) -> EventLoopFuture<[Value?]> where Value : RESPValueConvertible

Parameters

`keys`	The source sets to calculate the intersection of.
`valueType`	The type to convert all values to.

Return Value

A list of elements resulting from the intersection. Elements that fail the RESPValue conversion will be nil.

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                    sinter(of:)

Extension method

Calculates the intersection of two or more sets.

See https://redis.io/commands/sinter

Declaration

Swift

public func sinter(of keys: RedisKey...) -> EventLoopFuture<[RESPValue]>

Parameters


                                keys

The source sets to calculate the intersection of.

Return Value

A list of elements resulting from the intersection.

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                    sinter(of:valueType:)

Extension method

Calculates the intersection of two or more sets.

See https://redis.io/commands/sinter

Declaration

Swift

@inlinable
public func sinter<Value>(of keys: RedisKey..., valueType: Value.Type) -> EventLoopFuture<[Value?]> where Value : RESPValueConvertible

Parameters

`keys`	The source sets to calculate the intersection of.
`valueType`	The type to convert all values to.

Return Value

A list of elements resulting from the intersection. Elements that fail the RESPValue conversion will be nil.

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                    sinterstore(as:sources:)

Extension method

Calculates the intersetion of two or more sets and stores the result.

Important

If the destination key already exists, it is overwritten.

See https://redis.io/commands/sinterstore

Declaration

Swift

public func sinterstore(as destination: RedisKey, sources keys: [RedisKey]) -> EventLoopFuture<Int>

Parameters

`destination`	The key of the new set from the result.
`sources`	A list of source sets to calculate the intersection of.

Return Value

The number of elements in the intersection result.

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Union


                    
                    
                    sunion(of:)

Extension method

Calculates the union of two or more sets.

See https://redis.io/commands/sunion

Declaration

Swift

public func sunion(of keys: [RedisKey]) -> EventLoopFuture<[RESPValue]>

Parameters


                                keys

The source sets to calculate the union of.

Return Value

A list of elements resulting from the union.

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                    sunion(of:valueType:)

Extension method

Calculates the union of two or more sets.

See https://redis.io/commands/sunion

Declaration

Swift

@inlinable
public func sunion<Value>(of keys: [RedisKey], valueType: Value.Type) -> EventLoopFuture<[Value?]> where Value : RESPValueConvertible

Parameters

`keys`	The source sets to calculate the union of.
`valueType`	The type to convert all values to.

Return Value

A list of elements resulting from the union. Elements that fail the RESPValue conversion will be nil.

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                    sunion(of:)

Extension method

Calculates the union of two or more sets.

See https://redis.io/commands/sunion

Declaration

Swift

public func sunion(of keys: RedisKey...) -> EventLoopFuture<[RESPValue]>

Parameters


                                keys

The source sets to calculate the union of.

Return Value

A list of elements resulting from the union.

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                    sunion(of:valueType:)

Extension method

Calculates the union of two or more sets.

See https://redis.io/commands/sunion

Declaration

Swift

@inlinable
public func sunion<Value>(of keys: RedisKey..., valueType: Value.Type) -> EventLoopFuture<[Value?]> where Value : RESPValueConvertible

Parameters

`keys`	The source sets to calculate the union of.
`valueType`	The type to convert all values to.

Return Value

A list of elements resulting from the union. Elements that fail the RESPValue conversion will be nil.

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                    sunionstore(as:sources:)

Extension method

Calculates the union of two or more sets and stores the result.

Important

If the destination key already exists, it is overwritten.

See https://redis.io/commands/sunionstore

Declaration

Swift

public func sunionstore(as destination: RedisKey, sources keys: [RedisKey]) -> EventLoopFuture<Int>

Parameters

`destination`	The key of the new set from the result.
`sources`	A list of source sets to calculate the union of.

Return Value

The number of elements in the union result.

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Zadd


                    
                    
                    zadd(_:to:inserting:returning:)

Extension method

Adds elements to a sorted set, assigning their score to the values provided.

See https://redis.io/commands/zadd

Declaration

Swift

@inlinable
public func zadd<Value: RESPValueConvertible>(
    _ elements: [(element: Value, score: Double)],
    to key: RedisKey,
    inserting insertBehavior: RedisZaddInsertBehavior = .allElements,
    returning returnBehavior: RedisZaddReturnBehavior = .insertedElementsCount
) -> EventLoopFuture<Int>

Parameters

`elements`	A list of elements and their score to add to the sorted set.
`key`	The key of the sorted set.
`insertBehavior`	The desired behavior of handling new and existing elements in the SortedSet.
`returnBehavior`	The desired behavior of what the return value should represent.

Return Value

If returning is .changedElementsCount, the number of elements inserted and that had their score updated. Otherwise, just the number of new elements inserted.

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                    zadd(_:to:inserting:returning:)

Extension method

Adds elements to a sorted set, assigning their score to the values provided.

See https://redis.io/commands/zadd

Declaration

Swift

@inlinable
public func zadd<Value: RESPValueConvertible>(
    _ elements: (element: Value, score: Double)...,
    to key: RedisKey,
    inserting insertBehavior: RedisZaddInsertBehavior = .allElements,
    returning returnBehavior: RedisZaddReturnBehavior = .insertedElementsCount
) -> EventLoopFuture<Int>

Parameters

`elements`	A list of elements and their score to add to the sorted set.
`key`	The key of the sorted set.
`insertBehavior`	The desired behavior of handling new and existing elements in the SortedSet.
`returnBehavior`	The desired behavior of what the return value should represent.

Return Value

If returning is .changedElementsCount, the number of elements inserted and that had their score updated. Otherwise, just the number of new elements inserted.

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                    zadd(_:to:inserting:returning:)

Extension method

Adds an element to a sorted set, assigning their score to the value provided.

See https://redis.io/commands/zadd

Declaration

Swift

@inlinable
public func zadd<Value: RESPValueConvertible>(
    _ element: (element: Value, score: Double),
    to key: RedisKey,
    inserting insertBehavior: RedisZaddInsertBehavior = .allElements,
    returning returnBehavior: RedisZaddReturnBehavior = .insertedElementsCount
) -> EventLoopFuture<Bool>

Parameters

`element`	The element and its score to add to the sorted set.
`key`	The key of the sorted set.
`insertBehavior`	The desired behavior of handling new and existing elements in the SortedSet.
`returnBehavior`	The desired behavior of what the return value should represent.

Return Value

If returning is .changedElementsCount, the number of elements inserted and that had their score updated. Otherwise, just the number of new elements inserted.

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General


                    
                    
                    zcard(of:)

Extension method

Gets the number of elements in a sorted set.

See https://redis.io/commands/zcard

Declaration

Swift

public func zcard(of key: RedisKey) -> EventLoopFuture<Int>

Parameters

key

The key of the sorted set.

Return Value

The number of elements in the sorted set.

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                    zscore(of:in:)

Extension method

Gets the score of the specified element in a stored set.

See https://redis.io/commands/zscore

Declaration

Swift

@inlinable
public func zscore<Value>(of element: Value, in key: RedisKey) -> EventLoopFuture<Double?> where Value : RESPValueConvertible

Parameters

`element`	The element in the sorted set to get the score for.
`key`	The key of the sorted set.

Return Value

The score of the element provided, or nil if the element is not found in the set or the set does not exist.

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                    zscan(_:startingFrom:matching:count:)

Extension method

Incrementally iterates over all elements in a sorted set.

See https://redis.io/commands/zscan

Declaration

Swift

public func zscan(
    _ key: RedisKey,
    startingFrom position: Int = 0,
    matching match: String? = nil,
    count: Int? = nil
) -> EventLoopFuture<(Int, [(RESPValue, Double)])>

Parameters

`key`	The key identifying the sorted set.
`position`	The position to start the scan from.
`match`	A glob-style pattern to filter values to be selected from the result set.
`count`	The number of elements to advance by. Redis default is 10.

Return Value

A cursor position for additional invocations with a limited collection of elements found in the sorted set with their scores.

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                    zscan(_:startingFrom:matching:count:valueType:)

Extension method

Incrementally iterates over all elements in a sorted set.

See https://redis.io/commands/zscan

Declaration

Swift

@inlinable
public func zscan<Value: RESPValueConvertible>(
    _ key: RedisKey,
    startingFrom position: Int = 0,
    matching match: String? = nil,
    count: Int? = nil,
    valueType: Value.Type
) -> EventLoopFuture<(Int, [(Value, Double)?])>

Parameters

`key`	The key identifying the sorted set.
`position`	The position to start the scan from.
`match`	A glob-style pattern to filter values to be selected from the result set.
`count`	The number of elements to advance by. Redis default is 10.
`valueType`	The type to convert the values to.

Return Value

A cursor position for additional invocations with a limited collection of elements found in the sorted set with their scores. Any element that fails the RESPValue conversion will be nil.

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Rank


                    
                    
                    zrank(of:in:)

Extension method

Returns the rank (index) of the specified element in a sorted set.

Note

This treats the ordered set as ordered from low to high. For the inverse, see zrevrank(of:in:).

See https://redis.io/commands/zrank

Declaration

Swift

@inlinable
public func zrank<Value>(of element: Value, in key: RedisKey) -> EventLoopFuture<Int?> where Value : RESPValueConvertible

Parameters

`element`	The element in the sorted set to search for.
`key`	The key of the sorted set to search.

Return Value

The index of the element, or nil if the key was not found.

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                    zrevrank(of:in:)

Extension method

Returns the rank (index) of the specified element in a sorted set.

Note

This treats the ordered set as ordered from high to low. For the inverse, see zrank(of:in:).

See https://redis.io/commands/zrevrank

Declaration

Swift

@inlinable
public func zrevrank<Value>(of element: Value, in key: RedisKey) -> EventLoopFuture<Int?> where Value : RESPValueConvertible

Parameters

`element`	The element in the sorted set to search for.
`key`	The key of the sorted set to search.

Return Value

The index of the element, or nil if the key was not found.

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Count


                    
                    
                    zcount(of:withScoresBetween:)

Extension method

Returns the count of elements in a SortedSet with a score within the range specified (inclusive by default).

To get a count of elements that have at least the score of 3, but no greater than 10:

client.zcount(of: "mySortedSet", withScoresBetween: (3, 10))

To get a count of elements that have at least the score of 3, but less than 10:

client.zcount(of: "mySortedSet", withScoresBetween: (3, .exclusive(10)))

See RedisZScoreBound and https://redis.io/commands/zcount

Declaration

Swift

public func zcount(
    of key: RedisKey,
    withScoresBetween range: (min: RedisZScoreBound, max: RedisZScoreBound)
) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet that will be counted.
`range`	The min and max score bounds that an element should have in order to be counted.

Return Value

The count of elements in the SortedSet with a score matching the range specified.

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                    zcount(of:withScores:)

Extension method

Returns the count of elements in a SortedSet with a score within the inclusive range specified.

To get a count of elements that have at least the score of 3, but no greater than 10:

client.zcount(of: "mySortedSet", withScores: 3...10)

See https://redis.io/commands/zcount

Declaration

Swift

public func zcount(of key: RedisKey, withScores range: ClosedRange<Double>) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet that will be counted.
`range`	The inclusive range of scores to filter elements to count.

Return Value

The count of elements in the SortedSet with a score within the range specified.

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                    zcount(of:withScores:)

Extension method

Returns the count of elements in a SortedSet with a minimum score up to, but not including, a max score.

To get a count of elements that have at least the score of 3, but less than 10:

client.zcount(of: "mySortedSet", withScores: 3..<10)

See https://redis.io/commands/zcount

Declaration

Swift

public func zcount(of key: RedisKey, withScores range: Range<Double>) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet that will be counted.
`range`	A range with an inclusive lower and exclusive upper bound of scores to filter elements to count.

Return Value

The count of elements in the SortedSet with a score within the range specified.

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                    zcount(of:withMinimumScoreOf:)

Extension method

Returns the count of elements in a SortedSet whose score is greater than a minimum score value.

By default, the value provided will be treated as inclusive, meaning any element that has a score matching the value will be counted.

See RedisZScoreBound and https://redis.io/commands/zcount

Declaration

Swift

public func zcount(of key: RedisKey, withMinimumScoreOf minScore: RedisZScoreBound) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet that will be counted.
`minScore`	The minimum score bound an element in the SortedSet should have in order to be counted.

Return Value

The count of elements in the SortedSet above the minScore threshold.

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                    zcount(of:withMaximumScoreOf:)

Extension method

Returns the count of elements in a SortedSet whose score is less than a maximum score value.

By default, the value provided will be treated as inclusive, meaning any element that has a score matching the value will be counted.

See RedisZScoreBound and https://redis.io/commands/zcount

Declaration

Swift

public func zcount(of key: RedisKey, withMaximumScoreOf maxScore: RedisZScoreBound) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet that will be counted.
`maxScore`	The maximum score bound an element in the SortedSet should have in order to be counted.
`exclusive`	Should the `maxScore` provided be exclusive? If `true`, scores matching the `maxScore` will not be counted.

Return Value

The count of elements in the SortedSet below the maxScore threshold.

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Lexiographical Count


                    
                    
                    zlexcount(of:withValuesBetween:)

Extension method

Returns the count of elements in a SortedSet whose lexiographical values are between the range specified.

For example:

// "mySortedSet" contains the values [1, 2, 3, 10] each with a score of 1.
client.zlexcount(of: "mySortedSet", withValuesBetween: (.inclusive(1), .inclusive(3)))
// the response will resolve to 4, as both 10 and 1 have the value "1"

See RedisZLexBound and https://redis.io/commands/zlexcount

Warning

This assumes all elements in the SortedSet have the same score. If not, the returned elements are unspecified.

Declaration

Swift

@inlinable
public func zlexcount<Value: CustomStringConvertible>(
    of key: RedisKey,
    withValuesBetween range: (min: RedisZLexBound<Value>, max: RedisZLexBound<Value>)
) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet that will be counted.
`range`	The min and max value bounds that an element should have in order to be counted.

Return Value

The count of elements in the SortedSet with values matching the range specified.

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                    zlexcount(of:withMinimumValueOf:)

Extension method

Returns the count of elements in a SortedSet whose lexiographical value is greater than a minimum value.

For example with a SortedSet that contains the values [1, 2, 3, 10] and each a score of 1:

client.zlexcount(of: "mySortedSet", withMinimumValueOf: .inclusive(2))
// the response will resolve to 2, as "10" lexiographically comes before element "2"

client.zlexcount(of: "mySortedSet", withMinimumValueOf: .inclusive(10))
// the response will resolve to 3, as the set is ordered as ["1", "10", "2", "3"]

See RedisZLexBound and https://redis.io/commands/zlexcount

Warning

This assumes all elements in the SortedSet have the same score. If not, the returned elements are unspecified.

Declaration

Swift

@inlinable
public func zlexcount<Value: CustomStringConvertible>(
    of key: RedisKey,
    withMinimumValueOf minValue: RedisZLexBound<Value>
) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet that will be counted.
`minValue`	The minimum lexiographical value an element in the SortedSet should have in order to be counted.

Return Value

The count of elements in the SortedSet above the minValue threshold.

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                    zlexcount(of:withMaximumValueOf:)

Extension method

Returns the count of elements in a SortedSet whose lexiographical value is less than a maximum value.

For example with a SortedSet that contains the values [1, 2, 3, 10] and each a score of 1:

client.zlexcount(of: "mySortedSet", withMaximumValueOf: .exclusive(10))
// the response will resolve to 1, as "1" and "10" are sorted into the first 2 elements

client.zlexcount(of: "mySortedSet", withMaximumValueOf: .inclusive(3))
// the response will resolve to 4, as the set is ordered as ["1", "10", "2", "3"]

See RedisZLexBound and https://redis.io/commands/zlexcount

Warning

This assumes all elements in the SortedSet have the same score. If not, the returned elements are unspecified.

Declaration

Swift

@inlinable
public func zlexcount<Value: CustomStringConvertible>(
    of key: RedisKey,
    withMaximumValueOf maxValue: RedisZLexBound<Value>
) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet that will be counted.
`maxValue`	The maximum lexiographical value an element in the SortedSet should have in order to be counted.

Return Value

The count of elements in the SortedSet below the maxValue threshold.

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Pop


                    
                    
                    zpopmin(from:max:)

Extension method

Removes elements from a sorted set with the lowest scores.

See https://redis.io/commands/zpopmin

Declaration

Swift

public func zpopmin(from key: RedisKey, max count: Int) -> EventLoopFuture<[(RESPValue, Double)]>

Parameters

`key`	The key identifying the sorted set in Redis.
`count`	The max number of elements to pop from the set.

Return Value

A list of elements popped from the sorted set with their associated score.

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                    zpopmin(from:)

Extension method

Removes the element from a sorted set with the lowest score.

See https://redis.io/commands/zpopmin

Declaration

Swift

public func zpopmin(from key: RedisKey) -> EventLoopFuture<(RESPValue, Double)?>

Parameters

key

The key identifying the sorted set in Redis.

Return Value

The element and its associated score that was popped from the sorted set, or nil if set was empty.

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                    zpopmax(from:max:)

Extension method

Removes elements from a sorted set with the highest scores.

See https://redis.io/commands/zpopmax

Declaration

Swift

public func zpopmax(from key: RedisKey, max count: Int) -> EventLoopFuture<[(RESPValue, Double)]>

Parameters

`key`	The key identifying the sorted set in Redis.
`count`	The max number of elements to pop from the set.

Return Value

A list of elements popped from the sorted set with their associated score.

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                    zpopmax(from:)

Extension method

Removes the element from a sorted set with the highest score.

See https://redis.io/commands/zpopmax

Declaration

Swift

public func zpopmax(from key: RedisKey) -> EventLoopFuture<(RESPValue, Double)?>

Parameters

key

The key identifying the sorted set in Redis.

Return Value

The element and its associated score that was popped from the sorted set, or nil if set was empty.

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Blocking Pop


                    
                    
                    bzpopmin(from:timeout:)

Extension method

Removes the element from a sorted set with the lowest score, blocking until an element is available.

Important

This will block the connection from completing further commands until an element is available to pop from the set.

It is highly recommended to set a reasonable timeout or to use the non-blocking zpopmin method where possible.

See https://redis.io/commands/bzpopmin

Declaration

Swift

public func bzpopmin(
    from key: RedisKey,
    timeout: TimeAmount = .seconds(0)
) -> EventLoopFuture<(Double, RESPValue)?>

Parameters

`key`	The key identifying the sorted set in Redis.
`timeout`	The max time to wait for a value to use. `0`seconds means to wait indefinitely.

Return Value

The element and its associated score that was popped from the sorted set, or nil if the timeout was reached.

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                    bzpopmin(from:timeout:)

Extension method

Removes the element from a sorted set with the lowest score, blocking until an element is available.

Important

This will block the connection from completing further commands until an element is available to pop from the group of sets.

It is highly recommended to set a reasonable timeout or to use the non-blocking zpopmin method where possible.

See https://redis.io/commands/bzpopmin

Declaration

Swift

public func bzpopmin(
    from keys: [RedisKey],
    timeout: TimeAmount = .seconds(0)
) -> EventLoopFuture<(String, Double, RESPValue)?>

Parameters

`keys`	A list of sorted set keys in Redis.
`timeout`	The max time to wait for a value to use. `0`seconds means to wait indefinitely.

Return Value

If timeout was reached, nil.

Otherwise, the key of the sorted set the element was removed from, the element itself, and its associated score is returned.

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                    bzpopmax(from:timeout:)

Extension method

Removes the element from a sorted set with the highest score, blocking until an element is available.

Important

This will block the connection from completing further commands until an element is available to pop from the set.

It is highly recommended to set a reasonable timeout or to use the non-blocking zpopmax method where possible.

See https://redis.io/commands/bzpopmax

Declaration

Swift

public func bzpopmax(
    from key: RedisKey,
    timeout: TimeAmount = .seconds(0)
) -> EventLoopFuture<(Double, RESPValue)?>

Parameters

`key`	The key identifying the sorted set in Redis.
`timeout`	The max time to wait for a value to use. `0`seconds means to wait indefinitely.

Return Value

The element and its associated score that was popped from the sorted set, or nil if the timeout was reached.

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                    bzpopmax(from:timeout:)

Extension method

Removes the element from a sorted set with the highest score, blocking until an element is available.

Important

This will block the connection from completing further commands until an element is available to pop from the group of sets.

It is highly recommended to set a reasonable timeout or to use the non-blocking zpopmax method where possible.

See https://redis.io/commands/bzpopmax

Declaration

Swift

public func bzpopmax(
    from keys: [RedisKey],
    timeout: TimeAmount = .seconds(0)
) -> EventLoopFuture<(String, Double, RESPValue)?>

Parameters

`keys`	A list of sorted set keys in Redis.
`timeout`	The max time to wait for a value to use. `0`seconds means to wait indefinitely.

Return Value

If timeout was reached, nil.

Otherwise, the key of the sorted set the element was removed from, the element itself, and its associated score is returned.

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Increment


                    
                    
                    zincrby(_:element:in:)

Extension method

Increments the score of the specified element in a sorted set.

See https://redis.io/commands/zincrby

Declaration

Swift

@inlinable
public func zincrby<Value: RESPValueConvertible>(
    _ amount: Double,
    element: Value,
    in key: RedisKey
) -> EventLoopFuture<Double>

Parameters

`amount`	The amount to increment this element’s score by.
`element`	The element to increment.
`key`	The key of the sorted set.

Return Value

The new score of the element.

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Intersect and Union


                    
                    
                    zunionstore(as:sources:weights:aggregateMethod:)

Extension method

Calculates the union of two or more sorted sets and stores the result.

Note

This operation overwrites any value stored at the destination key.

See https://redis.io/commands/zunionstore

Declaration

Swift

public func zunionstore(
    as destination: RedisKey,
    sources: [RedisKey],
    weights: [Int]? = nil,
    aggregateMethod aggregate: RedisSortedSetAggregateMethod? = nil
) -> EventLoopFuture<Int>

Parameters

`destination`	The key of the new sorted set from the result.
`sources`	The list of sorted set keys to treat as the source of the union.
`weights`	The multiplying factor to apply to the corresponding `sources` key based on index of the two parameters.
`aggregateMethod`	The method of aggregating the values of the union. If one isn’t specified, Redis will default to `.sum`.

Return Value

The number of elements in the new sorted set.

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                    zinterstore(as:sources:weights:aggregateMethod:)

Extension method

Calculates the intersection of two or more sorted sets and stores the result.

Note

This operation overwrites any value stored at the destination key.

See https://redis.io/commands/zinterstore

Declaration

Swift

public func zinterstore(
    as destination: RedisKey,
    sources: [RedisKey],
    weights: [Int]? = nil,
    aggregateMethod aggregate: RedisSortedSetAggregateMethod? = nil
) -> EventLoopFuture<Int>

Parameters

`destination`	The key of the new sorted set from the result.
`sources`	The list of sorted set keys to treat as the source of the intersection.
`weights`	The multiplying factor to apply to the corresponding `sources` key based on index of the two parameters.
`aggregateMethod`	The method of aggregating the values of the intersection. If one isn’t specified, Redis will default to `.sum`.

Return Value

The number of elements in the new sorted set.

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Range


                    
                    
                    zrange(from:firstIndex:lastIndex:includeScoresInResponse:)

Extension method

Gets all elements from a SortedSet within the specified inclusive bounds of 0-based indices.

See https://redis.io/commands/zrange

Important

This treats the SortedSet as ordered from low to high.

For the inverse, see zrevrange(from:firstIndex:lastIndex:includeScoresInResponse:).

Declaration

Swift

public func zrange(
    from key: RedisKey,
    firstIndex: Int,
    lastIndex: Int,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet
`firstIndex`	The index of the first element to include in the range of elements returned.
`lastIndex`	The index of the last element to include in the range of elements returned.

Return Value

An array of elements found within the range specified.

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                    zrange(from:indices:includeScoresInResponse:)

Extension method

Gets all elements from a SortedSet within the specified inclusive bounds of 0-based indices.

To get the elements at index 4 through 7:

client.zrange(from: "mySortedSet", indices: 4...7)

To get the last 4 elements:

client.zrange(from: "mySortedSet", indices: (-4)...(-1))

To get the first and last 4 elements:

client.zrange(from: "mySortedSet", indices: (-4)...3)

To get the first element, and the last 4:

client.zrange(from: "mySortedSet", indices: (-4)...0))

See https://redis.io/commands/zrange

Warning

A ClosedRange cannot be created where upperBound is less than lowerBound; so while Redis may support 0...-1, ClosedRange will trigger a precondition failure.

If you need such a range, use zrange(from:firstIndex:lastIndex:) instead.

Important

This treats the SortedSet as ordered from low to high.

For the inverse, see zrevrange(from:indices:includeScoresInResponse:).

Declaration

Swift

public func zrange(
    from key: RedisKey,
    indices range: ClosedRange<Int>,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet to return elements from.
`range`	The range of inclusive indices of elements to get.

Return Value

An array of elements found within the range specified.

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                    zrange(from:indices:includeScoresInResponse:)

Extension method

Gets all the elements from a SortedSet starting with the first index bound up to, but not including, the element at the last index bound.

To get the elements at index 4 through 7:

client.zrange(from: "mySortedSet", indices: 4..<8)

To get the last 4 elements:

client.zrange(from: "mySortedSet", indices: (-4)..<0)

To get the first and last 4 elements:

client.zrange(from: "mySortedSet", indices: (-4)..<4)

To get the first element, and the last 4:

client.zrange(from: "mySortedSet", indices: (-4)..<1)

See https://redis.io/commands/zrange

Warning

A Range cannot be created where upperBound is less than lowerBound; so while Redis may support 0..<(-1), Range will trigger a precondition failure.

If you need such a range, use zrange(from:firstIndex:lastIndex:) instead.

Important

This treats the SortedSet as ordered from low to high.

For the inverse, see zrevrange(from:indices:includeScoresInResponse:).

Declaration

Swift

public func zrange(
    from key: RedisKey,
    indices range: Range<Int>,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet to return elements from.
`range`	The range of indices (inclusive lower, exclusive upper) elements to get.

Return Value

An array of elements found within the range specified.

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                    zrange(from:fromIndex:includeScoresInResponse:)

Extension method

Gets all elements from the index specified to the end of a SortedSet.

To get all except the first 2 elements of a SortedSet:

client.zrange(from: "mySortedSet", fromIndex: 2)

To get the last 4 elements of a SortedSet:

client.zrange(from: "mySortedSet", fromIndex: -4)

See zrange(from:indices:), zrange(from:firstIndex:lastIndex:), and https://redis.io/commands/zrange

Important

This treats the SortedSet as ordered from low to high.

For the inverse, see zrevrange(from:fromIndex:includeScoresInResponse:).

Declaration

Swift

public func zrange(
    from key: RedisKey,
    fromIndex index: Int,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet to return elements from.
`index`	The index of the first element that will be in the returned values.

Return Value

An array of elements from the SortedSet between the index and the end.

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                    zrange(from:throughIndex:includeScoresInResponse:)

Extension method

Gets all elements from the start of a SortedSet up to, and including, the element at the index specified.

To get the first 3 elements of a SortedSet:

client.zrange(from: "mySortedSet", throughIndex: 2)

To get all except the last 3 elements of a SortedSet:

client.zrange(from: "mySortedSet", throughIndex: -4)

See zrange(from:indices:), zrange(from:firstIndex:lastIndex:), and https://redis.io/commands/zrange

Important

This treats the SortedSet as ordered from low to high.

For the inverse, see zrevrange(from:throughIndex:includeScoresInResponse:).

Declaration

Swift

public func zrange(
    from key: RedisKey,
    throughIndex index: Int,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet to return elements from.
`index`	The index of the last element that will be in the returned values.

Return Value

An array of elements from the start of a SortedSet to the index.

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                    zrange(from:upToIndex:includeScoresInResponse:)

Extension method

Gets all elements from the start of a SortedSet up to, but not including, the element at the index specified.

To get the first 3 elements of a List:

client.zrange(from: "myList", upToIndex: 3)

To get all except the last 3 elements of a List:

client.zrange(from: "myList", upToIndex: -3)

See zrange(from:indices:), zrange(from:upToIndex:lastIndex:), and https://redis.io/commands/zrange

Important

This treats the SortedSet as ordered from low to high.

For the inverse, see zrevrange(from:upToIndex:includeScoresInResponse:).

Declaration

Swift

public func zrange(
    from key: RedisKey,
    upToIndex index: Int,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet to return elements from.
`index`	The index of the last element to not include in the returned values.

Return Value

An array of elements from the start of the SortedSet and up to the index.

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                    zrevrange(from:firstIndex:lastIndex:includeScoresInResponse:)

Extension method

Gets all elements from a SortedSet within the specified inclusive bounds of 0-based indices.

See https://redis.io/commands/zrevrange

Important

This treats the SortedSet as ordered from high to low.

For the inverse, see zrange(from:firstIndex:lastIndex:includeScoresInResponse:).

Declaration

Swift

public func zrevrange(
    from key: RedisKey,
    firstIndex: Int,
    lastIndex: Int,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet
`firstIndex`	The index of the first element to include in the range of elements returned.
`lastIndex`	The index of the last element to include in the range of elements returned.

Return Value

An array of elements found within the range specified.

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                    zrevrange(from:indices:includeScoresInResponse:)

Extension method

Gets all elements from a SortedSet within the specified inclusive bounds of 0-based indices.

To get the elements at index 4 through 7:

client.zrevrange(from: "mySortedSet", indices: 4...7)

To get the last 4 elements:

client.zrevrange(from: "mySortedSet", indices: (-4)...(-1))

To get the first and last 4 elements:

client.zrevrange(from: "mySortedSet", indices: (-4)...3)

To get the first element, and the last 4:

client.zrevrange(from: "mySortedSet", indices: (-4)...0))

See https://redis.io/commands/zrevrange

Warning

A ClosedRange cannot be created where upperBound is less than lowerBound; so while Redis may support 0...-1, ClosedRange will trigger a precondition failure.

If you need such a range, use zrevrange(from:firstIndex:lastIndex:) instead.

Important

This treats the SortedSet as ordered from high to low.

For the inverse, see zrange(from:indices:includeScoresInResponse:).

Declaration

Swift

public func zrevrange(
    from key: RedisKey,
    indices range: ClosedRange<Int>,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet to return elements from.
`range`	The range of inclusive indices of elements to get.

Return Value

An array of elements found within the range specified.

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                    zrevrange(from:indices:includeScoresInResponse:)

Extension method

Gets all the elements from a SortedSet starting with the first index bound up to, but not including, the element at the last index bound.

To get the elements at index 4 through 7:

client.zrevrange(from: "mySortedSet", indices: 4..<8)

To get the last 4 elements:

client.zrevrange(from: "mySortedSet", indices: (-4)..<0)

To get the first and last 4 elements:

client.zrevrange(from: "mySortedSet", indices: (-4)..<4)

To get the first element, and the last 4:

client.zrevrange(from: "mySortedSet", indices: (-4)..<1)

See https://redis.io/commands/zrevrange

Warning

A Range cannot be created where upperBound is less than lowerBound; so while Redis may support 0..<(-1), Range will trigger a precondition failure.

If you need such a range, use zrevrange(from:firstIndex:lastIndex:) instead.

Important

This treats the SortedSet as ordered from high to low.

For the inverse, see zrange(from:indices:includeScoresInResponse:).

Declaration

Swift

public func zrevrange(
    from key: RedisKey,
    indices range: Range<Int>,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet to return elements from.
`range`	The range of indices (inclusive lower, exclusive upper) elements to get.

Return Value

An array of elements found within the range specified.

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                    zrevrange(from:fromIndex:includeScoresInResponse:)

Extension method

Gets all elements from the index specified to the end of a SortedSet.

To get all except the first 2 elements of a SortedSet:

client.zrevrange(from: "mySortedSet", fromIndex: 2)

To get the last 4 elements of a SortedSet:

client.zrevrange(from: "mySortedSet", fromIndex: -4)

See zrevrange(from:indices:), zrevrange(from:firstIndex:lastIndex:), and https://redis.io/commands/zrevrange

Important

This treats the SortedSet as ordered from high to low.

For the inverse, see zrange(from:fromIndex:includeScoresInResponse:).

Declaration

Swift

public func zrevrange(
    from key: RedisKey,
    fromIndex index: Int,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet to return elements from.
`index`	The index of the first element that will be in the returned values.

Return Value

An array of elements from the SortedSet between the index and the end.

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                    zrevrange(from:throughIndex:includeScoresInResponse:)

Extension method

Gets all elements from the start of a SortedSet up to, and including, the element at the index specified.

To get the first 3 elements of a SortedSet:

client.zrevrange(from: "mySortedSet", throughIndex: 2)

To get all except the last 3 elements of a SortedSet:

client.zrevrange(from: "mySortedSet", throughIndex: -4)

See zrevrange(from:indices:), zrevrange(from:firstIndex:lastIndex:), and https://redis.io/commands/zrevrange

Important

This treats the SortedSet as ordered from high to low.

For the inverse, see zrange(from:throughIndex:includeScoresInResponse:).

Declaration

Swift

public func zrevrange(
    from key: RedisKey,
    throughIndex index: Int,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet to return elements from.
`index`	The index of the last element that will be in the returned values.

Return Value

An array of elements from the start of a SortedSet to the index.

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                    zrevrange(from:upToIndex:includeScoresInResponse:)

Extension method

Gets all elements from the start of a SortedSet up to, but not including, the element at the index specified.

To get the first 3 elements of a List:

client.zrevrange(from: "myList", upToIndex: 3)

To get all except the last 3 elements of a List:

client.zrevrange(from: "myList", upToIndex: -3)

See zrevrange(from:indices:), zrevrange(from:upToIndex:lastIndex:), and https://redis.io/commands/zrevrange

Important

This treats the SortedSet as ordered from high to low.

For the inverse, see zrange(from:upToIndex:includeScoresInResponse:).

Declaration

Swift

public func zrevrange(
    from key: RedisKey,
    upToIndex index: Int,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet to return elements from.
`index`	The index of the last element to not include in the returned values.

Return Value

An array of elements from the start of the SortedSet and up to the index.

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Range by Score


                    
                    
                    zrangebyscore(from:withScoresBetween:limitBy:includeScoresInResponse:)

Extension method

Gets all elements from a SortedSet whose score is within the range specified.

See RedisZScoreBound and https://redis.io/commands/zrangebyscore

Important

This treats the SortedSet as ordered from low to high.

For the inverse, see zrevrangebyscore(from:withScoresBetween:limitBy:includeScoresInResponse:).

Declaration

Swift

public func zrangebyscore(
    from key: RedisKey,
    withScoresBetween range: (min: RedisZScoreBound, max: RedisZScoreBound),
    limitBy limit: (offset: Int, count: Int)? = nil,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet.
`range`	The min and max score bounds to filter elements by.
`limit`	The optional offset and count of elements to query.
`includeScores`	Should the response array contain the elements AND their scores? If `true`, the response array will follow the pattern [Item_1, Score_1, Item_2, …]

Return Value

An array of elements from the SortedSet that were within the range provided, and optionally their scores.

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                    zrangebyscore(from:withScores:limitBy:includeScoresInResponse:)

Extension method

Gets all elements from a SortedSet whose score is within the inclusive range specified.

See RedisZScoreBound and https://redis.io/commands/zrangebyscore

Important

This treats the SortedSet as ordered from low to high.

For the inverse, see zrevrangebyscore(from:withScores:limitBy:includeScoresInResponse:).

Declaration

Swift

public func zrangebyscore(
    from key: RedisKey,
    withScores range: ClosedRange<Double>,
    limitBy limit: (offset: Int, count: Int)? = nil,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet.
`range`	The inclusive range of scores to filter elements by.
`limit`	The optional offset and count of elements to query.
`includeScores`	Should the response array contain the elements AND their scores? If `true`, the response array will follow the pattern [Item_1, Score_1, Item_2, …]

Return Value

An array of elements from the SortedSet that were within the range provided, and optionally their scores.

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                    zrangebyscore(from:withScores:limitBy:includeScoresInResponse:)

Extension method

Gets all elements from a SortedSet whose score is at least a minimum score up to, but not including, a max score.

See RedisZScoreBound and https://redis.io/commands/zrangebyscore

Important

This treats the SortedSet as ordered from low to high.

For the inverse, see zrevrangebyscore(from:withScores:limitBy:includeScoresInResponse:).

Declaration

Swift

public func zrangebyscore(
    from key: RedisKey,
    withScores range: Range<Double>,
    limitBy limit: (offset: Int, count: Int)? = nil,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet.
`range`	A range with an inclusive lower and exclusive upper bound of scores to filter elements by.
`limit`	The optional offset and count of elements to query.
`includeScores`	Should the response array contain the elements AND their scores? If `true`, the response array will follow the pattern [Item_1, Score_1, Item_2, …]

Return Value

An array of elements from the SortedSet that were within the range provided, and optionally their scores.

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                    zrangebyscore(from:withMinimumScoreOf:limitBy:includeScoresInResponse:)

Extension method

Gets all elements from a SortedSet whose score is greater than a minimum score value.

See RedisZScoreBound and https://redis.io/commands/zrangebyscore

Important

This treats the SortedSet as ordered from low to high.

For the inverse, see zrevrangebyscore(from:withMinimumScoreOf:limitBy:includeScoresInResponse:).

Declaration

Swift

public func zrangebyscore(
    from key: RedisKey,
    withMinimumScoreOf minScore: RedisZScoreBound,
    limitBy limit: (offset: Int, count: Int)? = nil,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet.
`range`	The minimum score bound an element in the SortedSet should have to be included in the response.
`limit`	The optional offset and count of elements to query.
`includeScores`	Should the response array contain the elements AND their scores? If `true`, the response array will follow the pattern [Item_1, Score_1, Item_2, …]

Return Value

An array of elements from the SortedSet that were within the range provided, and optionally their scores.

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                    zrangebyscore(from:withMaximumScoreOf:limitBy:includeScoresInResponse:)

Extension method

Gets all elements from a SortedSet whose score is less than a maximum score value.

See RedisZScoreBound and https://redis.io/commands/zrangebyscore

Important

This treats the SortedSet as ordered from low to high.

For the inverse, see zrevrangebyscore(from:withMaximumScoreOf:limitBy:includeScoresInResponse:).

Declaration

Swift

public func zrangebyscore(
    from key: RedisKey,
    withMaximumScoreOf maxScore: RedisZScoreBound,
    limitBy limit: (offset: Int, count: Int)? = nil,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet.
`range`	The maximum score bound an element in the SortedSet should have to be included in the response.
`limit`	The optional offset and count of elements to query.
`includeScores`	Should the response array contain the elements AND their scores? If `true`, the response array will follow the pattern [Item_1, Score_1, Item_2, …]

Return Value

An array of elements from the SortedSet that were within the range provided, and optionally their scores.

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                    zrevrangebyscore(from:withScoresBetween:limitBy:includeScoresInResponse:)

Extension method

Gets all elements from a SortedSet whose score is within the range specified.

See RedisZScoreBound and https://redis.io/commands/zrangebyscore

Important

This treats the SortedSet as ordered from high to low.

For the inverse, see zrangebyscore(from:withScoresBetween:limitBy:includeScoresInResponse:).

Declaration

Swift

public func zrevrangebyscore(
    from key: RedisKey,
    withScoresBetween range: (min: RedisZScoreBound, max: RedisZScoreBound),
    limitBy limit: (offset: Int, count: Int)? = nil,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet.
`range`	The min and max score bounds to filter elements by.
`limit`	The optional offset and count of elements to query.
`includeScores`	Should the response array contain the elements AND their scores? If `true`, the response array will follow the pattern [Item_1, Score_1, Item_2, …]

Return Value

An array of elements from the SortedSet that were within the range provided, and optionally their scores.

Show on GitLab


                    
                    
                    zrevrangebyscore(from:withScores:limitBy:includeScoresInResponse:)

Extension method

Gets all elements from a SortedSet whose score is within the inclusive range specified.

See RedisZScoreBound and https://redis.io/commands/zrangebyscore

Important

This treats the SortedSet as ordered from high to low.

For the inverse, see zrangebyscore(from:withScores:limitBy:includeScoresInResponse:).

Declaration

Swift

public func zrevrangebyscore(
    from key: RedisKey,
    withScores range: ClosedRange<Double>,
    limitBy limit: (offset: Int, count: Int)? = nil,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet.
`range`	The inclusive range of scores to filter elements by.
`limit`	The optional offset and count of elements to query.
`includeScores`	Should the response array contain the elements AND their scores? If `true`, the response array will follow the pattern [Item_1, Score_1, Item_2, …]

Return Value

An array of elements from the SortedSet that were within the range provided, and optionally their scores.

Show on GitLab


                    
                    
                    zrevrangebyscore(from:withScores:limitBy:includeScoresInResponse:)

Extension method

Gets all elements from a SortedSet whose score is at least a minimum score up to, but not including, a max score.

See RedisZScoreBound and https://redis.io/commands/zrangebyscore

Important

This treats the SortedSet as ordered from high to low.

For the inverse, see zrangebyscore(from:withScores:limitBy:includeScoresInResponse:).

Declaration

Swift

public func zrevrangebyscore(
    from key: RedisKey,
    withScores range: Range<Double>,
    limitBy limit: (offset: Int, count: Int)? = nil,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet.
`range`	A range with an inclusive lower and exclusive upper bound of scores to filter elements by.
`limit`	The optional offset and count of elements to query.
`includeScores`	Should the response array contain the elements AND their scores? If `true`, the response array will follow the pattern [Item_1, Score_1, Item_2, …]

Return Value

An array of elements from the SortedSet that were within the range provided, and optionally their scores.

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                    zrevrangebyscore(from:withMinimumScoreOf:limitBy:includeScoresInResponse:)

Extension method

Gets all elements from a SortedSet whose score is greater than a minimum score value.

See RedisZScoreBound and https://redis.io/commands/zrangebyscore

Important

This treats the SortedSet as ordered from high to low.

For the inverse, see zrangebyscore(from:withMinimumScoreOf:limitBy:includeScoresInResponse:).

Declaration

Swift

public func zrevrangebyscore(
    from key: RedisKey,
    withMinimumScoreOf minScore: RedisZScoreBound,
    limitBy limit: (offset: Int, count: Int)? = nil,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet.
`range`	The minimum score bound an element in the SortedSet should have to be included in the response.
`limit`	The optional offset and count of elements to query.
`includeScores`	Should the response array contain the elements AND their scores? If `true`, the response array will follow the pattern [Item_1, Score_1, Item_2, …]

Return Value

An array of elements from the SortedSet that were within the range provided, and optionally their scores.

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                    zrevrangebyscore(from:withMaximumScoreOf:limitBy:includeScoresInResponse:)

Extension method

Gets all elements from a SortedSet whose score is less than a maximum score value.

See RedisZScoreBound and https://redis.io/commands/zrangebyscore

Important

This treats the SortedSet as ordered from high to low.

For the inverse, see zrangebyscore(from:withMaximumScoreOf:limitBy:includeScoresInResponse:).

Declaration

Swift

public func zrevrangebyscore(
    from key: RedisKey,
    withMaximumScoreOf maxScore: RedisZScoreBound,
    limitBy limit: (offset: Int, count: Int)? = nil,
    includeScoresInResponse includeScores: Bool = false
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet.
`range`	The maximum score bound an element in the SortedSet should have to be included in the response.
`limit`	The optional offset and count of elements to query.
`includeScores`	Should the response array contain the elements AND their scores? If `true`, the response array will follow the pattern [Item_1, Score_1, Item_2, …]

Return Value

An array of elements from the SortedSet that were within the range provided, and optionally their scores.

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Range by Lexiographical


                    
                    
                    zrangebylex(from:withValuesBetween:limitBy:)

Extension method

Gets all elements from a SortedSet whose lexiographical values are between the range specified.

For example:

// "mySortedSet" contains the values [1, 2, 3, 10] each with a score of 1
client.zrangebylex(of: "mySortedSet", withValuesBetween: (.inclusive(1), .exclusive(3)))
// the response resolves to [1, 10, 2]

See RedisZLexBound and https://redis.io/commands/zrangebylex

Warning

This assumes all elements in the SortedSet have the same score. If not, the returned elements are unspecified.

Important

This treats the SortedSet as ordered from low to high.

For the inverse, see zrevrangebylex(from:withValuesBetween:limitBy:).

Declaration

Swift

@inlinable
public func zrangebylex<Value: CustomStringConvertible>(
    from key: RedisKey,
    withValuesBetween range: (min: RedisZLexBound<Value>, max: RedisZLexBound<Value>),
    limitBy limit: (offset: Int, count: Int)? = nil
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet that will be counted.
`range`	The min and max value bounds for filtering elements by.
`limitBy`	The optional offset and count of elements to query.

Return Value

An array of elements from the SortedSet that were within the range provided.

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                    zrangebylex(from:withMinimumValueOf:limitBy:)

Extension method

Gets all elements from a SortedSet whose lexiographical value is greater than a minimum value.

// "mySortedSet" contains the values [1, 2, 3, 10] each with a score of 1
client.zrangebylex(of: "mySortedSet", withMinimumValueOf: .inclusive(1))
// the response resolves to [1, 10, 2, 3]

See RedisZLexBound and https://redis.io/commands/zrangebylex

Warning

This assumes all elements in the SortedSet have the same score. If not, the returned elements are unspecified.

Important

This treats the SortedSet as ordered from low to high.

For the inverse, see zrevrangebylex(from:withMinimumValueOf:limitBy:).

Declaration

Swift

@inlinable
public func zrangebylex<Value: CustomStringConvertible>(
    from key: RedisKey,
    withMinimumValueOf minValue: RedisZLexBound<Value>,
    limitBy limit: (offset: Int, count: Int)? = nil
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet.
`minValue`	The minimum lexiographical value an element in the SortedSet should have to be included in the result set.
`limit`	The optional offset and count of elements to query

Return Value

An array of elements from the SortedSet above the minValue threshold.

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                    zrangebylex(from:withMaximumValueOf:limitBy:)

Extension method

Gets all elements from a SortedSet whose lexiographical value is less than a maximum value.

// "mySortedSet" contains the values [1, 2, 3, 10] each with a score of 1
client.zlexcount(of: "mySortedSet", withMaximumValueOf: .exclusive(2))
// the response resolves to [1, 10]

See RedisZLexBound and https://redis.io/commands/zrangebylex

Warning

This assumes all elements in the SortedSet have the same score. If not, the returned elements are unspecified.

Important

This treats the SortedSet as ordered from low to high.

For the inverse, see zrevrangebylex(from:withMaximumValueOf:limitBy:).

Declaration

Swift

@inlinable
public func zrangebylex<Value: CustomStringConvertible>(
    from key: RedisKey,
    withMaximumValueOf maxValue: RedisZLexBound<Value>,
    limitBy limit: (offset: Int, count: Int)? = nil
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet.
`minValue`	The maximum lexiographical value an element in the SortedSet should have to be included in the result set.
`limit`	The optional offset and count of elements to query

Return Value

An array of elements from the SortedSet below the maxValue threshold.

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                    zrevrangebylex(from:withValuesBetween:limitBy:)

Extension method

Gets all elements from a SortedSet whose lexiographical values are between the range specified.

For example:

// "mySortedSet" contains the values [1, 2, 3, 10] each with a score of 1
client.zrevrangebylex(of: "mySortedSet", withValuesBetween: (.inclusive(1), .exclusive(3)))
// the response resolves to [2, 10 1]

See RedisZLexBound and https://redis.io/commands/zrevrangebylex

Warning

This assumes all elements in the SortedSet have the same score. If not, the returned elements are unspecified.

Important

This treats the SortedSet as ordered from high to low.

For the inverse, see zrangebylex(from:withValuesBetween:limitBy:).

Declaration

Swift

@inlinable
public func zrevrangebylex<Value: CustomStringConvertible>(
    from key: RedisKey,
    withValuesBetween range: (min: RedisZLexBound<Value>, max: RedisZLexBound<Value>),
    limitBy limit: (offset: Int, count: Int)? = nil
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet that will be counted.
`range`	The min and max value bounds for filtering elements by.
`limitBy`	The optional offset and count of elements to query.

Return Value

An array of elements from the SortedSet that were within the range provided.

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                    zrevrangebylex(from:withMinimumValueOf:limitBy:)

Extension method

Gets all elements from a SortedSet whose lexiographical value is greater than a minimum value.

// "mySortedSet" contains the values [1, 2, 3, 10] each with a score of 1
client.zrevrangebylex(of: "mySortedSet", withMinimumValueOf: .inclusive(1))
// the response resolves to [3, 2, 10, 1]

See RedisZLexBound and https://redis.io/commands/zrevrangebylex

Warning

This assumes all elements in the SortedSet have the same score. If not, the returned elements are unspecified.

Important

This treats the SortedSet as ordered from high to low.

For the inverse, see zrangebylex(from:withMinimumValueOf:limitBy:).

Declaration

Swift

@inlinable
public func zrevrangebylex<Value: CustomStringConvertible>(
    from key: RedisKey,
    withMinimumValueOf minValue: RedisZLexBound<Value>,
    limitBy limit: (offset: Int, count: Int)? = nil
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet.
`minValue`	The minimum lexiographical value an element in the SortedSet should have to be included in the result set.
`limit`	The optional offset and count of elements to query

Return Value

An array of elements from the SortedSet above the minValue threshold.

Show on GitLab


                    
                    
                    zrevrangebylex(from:withMaximumValueOf:limitBy:)

Extension method

Gets all elements from a SortedSet whose lexiographical value is less than a maximum value.

// "mySortedSet" contains the values [1, 2, 3, 10] each with a score of 1
client.zrevrangebylex(of: "mySortedSet", withMaximumValueOf: .exclusive(2))
// the response resolves to [10, 1]

See RedisZLexBound and https://redis.io/commands/zrevrangebylex

Warning

This assumes all elements in the SortedSet have the same score. If not, the returned elements are unspecified.

Important

This treats the SortedSet as ordered from high to low.

For the inverse, see zrangebylex(from:withMaximumValueOf:limitBy:).

Declaration

Swift

@inlinable
public func zrevrangebylex<Value: CustomStringConvertible>(
    from key: RedisKey,
    withMaximumValueOf maxValue: RedisZLexBound<Value>,
    limitBy limit: (offset: Int, count: Int)? = nil
) -> EventLoopFuture<[RESPValue]>

Parameters

`key`	The key of the SortedSet.
`minValue`	The maximum lexiographical value an element in the SortedSet should have to be included in the result set.
`limit`	The optional offset and count of elements to query

Return Value

An array of elements from the SortedSet below the maxValue threshold.

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Remove


                    
                    
                    zrem(_:from:)

Extension method

Removes the specified elements from a sorted set.

See https://redis.io/commands/zrem

Declaration

Swift

@inlinable
public func zrem<Value>(_ elements: [Value], from key: RedisKey) -> EventLoopFuture<Int> where Value : RESPValueConvertible

Parameters

`elements`	The values to remove from the sorted set.
`key`	The key of the sorted set.

Return Value

The number of elements removed from the set.

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                    zrem(_:from:)

Extension method

Removes the specified elements from a sorted set.

See https://redis.io/commands/zrem

Declaration

Swift

@inlinable
public func zrem<Value>(_ elements: Value..., from key: RedisKey) -> EventLoopFuture<Int> where Value : RESPValueConvertible

Parameters

`elements`	The values to remove from the sorted set.
`key`	The key of the sorted set.

Return Value

The number of elements removed from the set.

Show on GitLab

Remove by Lexiographical


                    
                    
                    zremrangebylex(from:withValuesBetween:)

Extension method

Removes elements from a SortedSet whose lexiographical values are between the range specified.

For example:

// "mySortedSet" contains the values [1, 2, 3, 10] each with a score of 1.
client.zremrangebylex(from: "mySortedSet", withValuesBetween: (.inclusive(10), .exclusive(3))
// elements 10 and 2 were removed

See RedisZLexBound and https://redis.io/commands/zremrangebylex

Warning

This assumes all elements in the SortedSet have the same score. If not, the elements removed are unspecified.

Declaration

Swift

@inlinable
public func zremrangebylex<Value: CustomStringConvertible>(
    from key: RedisKey,
    withValuesBetween range: (min: RedisZLexBound<Value>, max: RedisZLexBound<Value>)
) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet to remove elements from.
`range`	The min and max value bounds that an element should have to be removed.

Return Value

The count of elements that were removed from the SortedSet.

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                    zremrangebylex(from:withMinimumValueOf:)

Extension method

Removes elements from a SortedSet whose lexiographical values are greater than a minimum value.

For example:

// "mySortedSet" contains the values [1, 2, 3, 10] each with a score of 1.
client.zremrangebylex(from: "mySortedSet", withMinimumValueOf: .inclusive(10))
// elements 10, 2, and 3 are removed

See RedisZLexBound and https://redis.io/commands/zremrangebylex

Warning

This assumes all elements in the SortedSet have the same score. If not, the elements removed are unspecified.

Declaration

Swift

@inlinable
public func zremrangebylex<Value: CustomStringConvertible>(
    from key: RedisKey,
    withMinimumValueOf minValue: RedisZLexBound<Value>
) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet to remove elements from.
`minValue`	The minimum lexiographical value an element in the SortedSet should have to be removed.

Return Value

The count of elements that were removed from the SortedSet.

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                    zremrangebylex(from:withMaximumValueOf:)

Extension method

Removes elements from a SortedSet whose lexiographical values are less than a maximum value.

For example:

// "mySortedSet" contains the values [1, 2, 3, 10] each with a score of 1.
client.zremrangebylex(from: "mySortedSet", withMaximumValueOf: .exclusive(2))
// elements 1 and 10 are removed

See RedisZLexBound and https://redis.io/commands/zremrangebylex

Warning

This assumes all elements in the SortedSet have the same score. If not, the elements removed are unspecified.

Declaration

Swift

@inlinable
public func zremrangebylex<Value: CustomStringConvertible>(
    from key: RedisKey,
    withMaximumValueOf maxValue: RedisZLexBound<Value>
) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet to remove elements from.
`maxValue`	The maximum lexiographical value and element in the SortedSet should have to be removed.

Return Value

The count of elements that were removed from the SortedSet.

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Remove by Rank


                    
                    
                    zremrangebyrank(from:firstIndex:lastIndex:)

Extension method

Removes all elements from a SortedSet within the specified inclusive bounds of 0-based indices.

See https://redis.io/commands/zremrangebyrank

Declaration

Swift

public func zremrangebyrank(from key: RedisKey, firstIndex: Int, lastIndex: Int) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet to remove elements from.
`firstIndex`	The index of the first element to remove.
`lastIndex`	The index of the last element to remove.

Return Value

The count of elements that were removed from the SortedSet.

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                    zremrangebyrank(from:indices:)

Extension method

Removes all elements from a SortedSet within the specified inclusive bounds of 0-based indices.

See https://redis.io/commands/zremrangebyrank

Warning

A ClosedRange cannot be created where upperBound is less than lowerBound; so while Redis may support 0...-1, ClosedRange will trigger a precondition failure.

If you need such a range, use zremrangebyrank(from:firstIndex:lastIndex:) instead.

Declaration

Swift

public func zremrangebyrank(from key: RedisKey, indices range: ClosedRange<Int>) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet to remove elements from.
`range`	The range of inclusive indices of elements to remove.

Return Value

The count of elements that were removed from the SortedSet.

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                    zremrangebyrank(from:indices:)

Extension method

Removes all elements from a SortedSet starting with the first index bound up to, but not including, the element at the last index bound.

See https://redis.io/commands/zremrangebyrank

Warning

A Range cannot be created where upperBound is less than lowerBound; so while Redis may support 0...-1, Range will trigger a precondition failure.

If you need such a range, use zremrangebyrank(from:firstIndex:lastIndex:) instead.

Declaration

Swift

public func zremrangebyrank(from key: RedisKey, indices range: Range<Int>) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet to remove elements from.
`range`	The range of indices (inclusive lower, exclusive upper) elements to remove.

Return Value

The count of elements that were removed from the SortedSet.

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                    zremrangebyrank(from:fromIndex:)

Extension method

Removes all elements from the index specified to the end of a SortedSet.

See https://redis.io/commands/zremrangebyrank

Declaration

Swift

public func zremrangebyrank(from key: RedisKey, fromIndex index: Int) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet to remove elements from.
`index`	The index of the first element that will be removed.

Return Value

The count of elements that were removed from the SortedSet.

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                    zremrangebyrank(from:throughIndex:)

Extension method

Removes all elements from the start of a SortedSet up to, and including, the element at the index specified.

See https://redis.io/commands/zremrangebyrank

Declaration

Swift

public func zremrangebyrank(from key: RedisKey, throughIndex index: Int) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet to remove elements from.
`index`	The index of the last element that will be removed.

Return Value

The count of elements that were removed from the SortedSet.

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                    zremrangebyrank(from:upToIndex:)

Extension method

Removes all elements from the start of a SortedSet up to, but not including, the element at the index specified.

See https://redis.io/commands/zremrangebyrank

Warning

Providing an index of 0 will remove all elements from the SortedSet.

Declaration

Swift

public func zremrangebyrank(from key: RedisKey, upToIndex index: Int) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet to remove elements from.
`index`	The index of the last element to not remove.

Return Value

The count of elements that were removed from the SortedSet.

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Remove by Score


                    
                    
                    zremrangebyscore(from:withScoresBetween:)

Extension method

Removes elements from a SortedSet whose score is within the range specified.

See RedisZScoreBound and https://redis.io/commands/zremrangebyscore

Declaration

Swift

public func zremrangebyscore(
    from key: RedisKey,
    withScoresBetween range: (min: RedisZScoreBound, max: RedisZScoreBound)
) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet to remove elements from.
`range`	The min and max score bounds to filter elements by.

Return Value

The count of elements that were removed from the SortedSet.

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                    zremrangebyscore(from:withScores:)

Extension method

Removes elements from a SortedSet whose score is within the inclusive range specified.

See RedisZScoreBound and https://redis.io/commands/zremrangebyscore

Declaration

Swift

public func zremrangebyscore(from key: RedisKey, withScores range: ClosedRange<Double>) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet to remove elements from.
`range`	The inclusive range of scores to filter elements by.

Return Value

The count of elements that were removed from the SortedSet.

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                    zremrangebyscore(from:withScores:)

Extension method

Removes elements from a SortedSet whose score is at least a minimum score up to, but not including, a max score.

See RedisZScoreBound and https://redis.io/commands/zremrangebyscore

Declaration

Swift

public func zremrangebyscore(from key: RedisKey, withScores range: Range<Double>) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet to remove elements from.
`range`	A range with an inclusive lower and exclusive upper bound of scores to filter elements by.

Return Value

The count of elements that were removed from the SortedSet.

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                    zremrangebyscore(from:withMinimumScoreOf:)

Extension method

Removes elements from a SortedSet whose score is greater than a minimum score value.

See RedisZScoreBound and https://redis.io/commands/zremrangebyscore

Declaration

Swift

public func zremrangebyscore(from key: RedisKey, withMinimumScoreOf minScore: RedisZScoreBound) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet to remove elements from.
`minScore`	The minimum score bound an element in the SortedSet should have to be removed.

Return Value

The count of elements that were removed from the SortedSet.

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                    zremrangebyscore(from:withMaximumScoreOf:)

Extension method

Removes elements from a SortedSet whose score is less than a maximum score value.

See RedisZScoreBound and https://redis.io/commands/zremrangebyscore

Declaration

Swift

public func zremrangebyscore(from key: RedisKey, withMaximumScoreOf maxScore: RedisZScoreBound) -> EventLoopFuture<Int>

Parameters

`key`	The key of the SortedSet to remove elements from.
`minScore`	The maximum score bound an element in the SortedSet should have to be removed.

Return Value

The count of elements that were removed from the SortedSet.

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Get


                    
                    
                    get(_:)

Extension method

Get the value of a key.

https://redis.io/commands/get

Declaration

Swift

public func get(_ key: RedisKey) -> EventLoopFuture<RESPValue>

Parameters

key

The key to fetch the value from.

Return Value

The value stored at the key provided. If the key does not exist, the value will be .null.

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                    get(_:as:)

Extension method

Get the value of a key, converting it to the desired type.

https://redis.io/commands/get

Declaration

Swift

@inlinable
public func get<StoredType: RESPValueConvertible>(
    _ key: RedisKey,
    as type: StoredType.Type
) -> EventLoopFuture<StoredType?>

Parameters

`key`	The key to fetch the value from.
`type`	The desired type to convert the stored data to.

Return Value

The converted value stored at the key provided, otherwise nil if the key does not exist or fails the type conversion.

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                    mget(_:)

Extension method

Gets the values of all specified keys, using .null to represent non-existant values.

See https://redis.io/commands/mget

Declaration

Swift

public func mget(_ keys: [RedisKey]) -> EventLoopFuture<[RESPValue]>

Parameters


                                keys

The list of keys to fetch the values from.

Return Value

The values stored at the keys provided, matching the same order.

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                    mget(_:as:)

Extension method

Gets the values of all specified keys, using .null to represent non-existant values.

See https://redis.io/commands/mget

Declaration

Swift

@inlinable
public func mget<Value>(_ keys: [RedisKey], as type: Value.Type) -> EventLoopFuture<[Value?]> where Value : RESPValueConvertible

Parameters

`keys`	The list of keys to fetch the values from.
`type`	The type to convert the values to.

Return Value

The values stored at the keys provided, matching the same order. Values that fail the RESPValue conversion will be nil.

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                    mget(_:)

Extension method

Gets the values of all specified keys, using .null to represent non-existant values.

See https://redis.io/commands/mget

Declaration

Swift

public func mget(_ keys: RedisKey...) -> EventLoopFuture<[RESPValue]>

Parameters


                                keys

The list of keys to fetch the values from.

Return Value

The values stored at the keys provided, matching the same order.

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                    mget(_:as:)

Extension method

Gets the values of all specified keys, using .null to represent non-existant values.

See https://redis.io/commands/mget

Declaration

Swift

@inlinable
public func mget<Value>(_ keys: RedisKey..., as type: Value.Type) -> EventLoopFuture<[Value?]> where Value : RESPValueConvertible

Parameters

`keys`	The list of keys to fetch the values from.
`type`	The type to convert the values to.

Return Value

The values stored at the keys provided, matching the same order. Values that fail the RESPValue conversion will be nil.

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Set


                    
                    
                    append(_:to:)

Extension method

Append a value to the end of an existing entry.

Note

If the key does not exist, it is created and set as an empty string, so APPEND will be similar to SET in this special case.

See https://redis.io/commands/append

Declaration

Swift

@inlinable
public func append<Value>(_ value: Value, to key: RedisKey) -> EventLoopFuture<Int> where Value : RESPValueConvertible

Parameters

`value`	The value to append onto the value stored at the key.
`key`	The key to use to uniquely identify this value.

Return Value

The length of the key’s value after appending the additional value.

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                    set(_:to:)

Extension method

Sets the value stored in the key provided, overwriting the previous value.

Any previous expiration set on the key is discarded if the SET operation was successful.

Important

Regardless of the type of value stored at the key, it will be overwritten to a string value.

https://redis.io/commands/set

Declaration

Swift

@inlinable
public func set<Value>(_ key: RedisKey, to value: Value) -> EventLoopFuture<Void> where Value : RESPValueConvertible

Parameters

`key`	The key to use to uniquely identify this value.
`value`	The value to set the key to.

Return Value

An EventLoopFuture that resolves if the operation was successful.

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                    set(_:to:onCondition:expiration:)

Extension method

Sets the key to the provided value with options to control how it is set.

https://redis.io/commands/set

Important

Regardless of the type of data stored at the key, it will be overwritten to a “string” data type.

ie. If the key is a reference to a Sorted Set, its value will be overwritten to be a “string” data type.

Declaration

Swift

public func set<Value: RESPValueConvertible>(
    _ key: RedisKey,
    to value: Value,
    onCondition condition: RedisSetCommandCondition,
    expiration: RedisSetCommandExpiration? = nil
) -> EventLoopFuture<RedisSetCommandResult>

Parameters

`key`	The key to use to uniquely identify this value.
`value`	The value to set the key to.
`condition`	The condition under which the key should be set.
`expiration`	The expiration to use when setting the key. No expiration is set if `nil`.

Return Value

A NIO.EventLoopFuture indicating the result of the operation; .ok if the operation was successful and .conditionNotMet if the specified condition was not met.

If the condition .none was used, then the result value will always be .ok.

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                    setnx(_:to:)

Extension method

Sets the key to the provided value if the key does not exist.

https://redis.io/commands/setnx

Important

Regardless of the type of data stored at the key, it will be overwritten to a “string” data type.

ie. If the key is a reference to a Sorted Set, its value will be overwritten to be a “string” data type.

Declaration

Swift

@inlinable
public func setnx<Value>(_ key: RedisKey, to value: Value) -> EventLoopFuture<Bool> where Value : RESPValueConvertible

Parameters

`key`	The key to use to uniquely identify this value.
`value`	The value to set the key to.

Return Value

true if the operation successfully completed.

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                    setex(_:to:expirationInSeconds:)

Extension method

Sets a key to the provided value and an expiration timeout in seconds.

See https://redis.io/commands/setex

Important

Regardless of the type of data stored at the key, it will be overwritten to a “string” data type.

ie. If the key is a reference to a Sorted Set, its value will be overwritten to be a “string” data type.

Important

The actual expiration used will be the specified value or 1, whichever is larger.

Declaration

Swift

@inlinable
public func setex<Value: RESPValueConvertible>(
    _ key: RedisKey,
    to value: Value,
    expirationInSeconds expiration: Int
) -> EventLoopFuture<Void>

Parameters

`key`	The key to use to uniquely identify this value.
`value`	The value to set the key to.
`expiration`	The number of seconds after which to expire the key.

Return Value

A NIO.EventLoopFuture that resolves if the operation was successful.

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                    psetex(_:to:expirationInMilliseconds:)

Extension method

Sets a key to the provided value and an expiration timeout in milliseconds.

See https://redis.io/commands/psetex

Important

Regardless of the type of data stored at the key, it will be overwritten to a “string” data type.

ie. If the key is a reference to a Sorted Set, its value will be overwritten to be a “string” data type.

Important

The actual expiration used will be the specified value or 1, whichever is larger.

Declaration

Swift

@inlinable
public func psetex<Value: RESPValueConvertible>(
    _ key: RedisKey,
    to value: Value,
    expirationInMilliseconds expiration: Int
) -> EventLoopFuture<Void>

Parameters

`key`	The key to use to uniquely identify this value.
`value`	The value to set the key to.
`expiration`	The number of milliseconds after which to expire the key.

Return Value

A NIO.EventLoopFuture that resolves if the operation was successful.

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                    mset(_:)

Extension method

Sets each key to their respective new value, overwriting existing values.

Note

Use msetnx(_:) if you don’t want to overwrite values.

See https://redis.io/commands/mset

Declaration

Swift

@inlinable
public func mset<Value>(_ operations: [RedisKey : Value]) -> EventLoopFuture<Void> where Value : RESPValueConvertible

Parameters


                                operations

The key-value list of SET operations to execute.

Return Value

An EventLoopFuture that resolves if the operation was successful.

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msetnx(_:) Extension method
Sets each key to their respective new value, only if all keys do not currently exist.

Note
Use mset(_:) if you don’t care about overwriting values.

See https://redis.io/commands/msetnx
Declaration
Swift

@inlinable public func msetnx<Value>(_ operations: [