Redis Lrem Command | Novice Tutorial

Novice Tutorial -- Learning Not Just Technology, But Dreams!

Redis Tutorial Redis Tutorial Redis Introduction Redis Installation Redis Configuration Redis Data Types

Redis Commands

Redis Commands Redis Keys Redis Strings Redis Hash Redis List Redis Set Redis Sorted Set Redis HyperLogLog Redis Publish Subscribe Redis Transactions Redis Scripting Redis Connection Redis Server Redis GEO Redis Stream

Redis Advanced Tutorial

Redis Data Backup and Recovery Redis Security Redis Performance Testing Redis Client Connection Redis Pipelining Redis Partitioning Java Using Redis PHP Using Redis Redis Hash Redis Set

Redis Lrem Command

Redis List Redis Lrem removes elements from the list that are equal to the parameter VALUE based on the value of the parameter COUNT. The value of COUNT can be the following: * count > 0: Start searching from the head of the list towards the tail, remove COUNT number of elements that are equal to VALUE. * count < 0: Start searching from the tail of the list towards the head, remove COUNT absolute value number of elements that are equal to VALUE. * count = 0: Remove all values in the list that are equal to VALUE.

Syntax

Basic syntax of redis Lrem command is as follows:

redis 127.0.0.1:6379> LREM key count VALUE

Available Versions

>= 1.0.0

Return Value

Number of elements removed. Returns 0 when the list does not exist.

Example

redis> RPUSH mylist "hello"
(integer) 1
redis> RPUSH mylist "hello"
(integer) 2
redis> RPUSH mylist "foo"
(integer) 3
redis> RPUSH mylist "hello"
(integer) 4
redis> LREM mylist -2 "hello"
(integer) 2
redis> LRANGE mylist 0 -1
1) "hello"
2) "foo"
redis>

Redis List

YouTip

Lists Lrem