Advanced Redis Tutorial

Redis Lists (List)

Redis Ltrim Command

Redis Ltrim trims a list by keeping only the elements within the specified range, and deleting all elements outside the specified range. 1 Index 0 represents the first element of the list, with You can also use negative indices to represent the second element of the list, and so on. -1 represents the last element of the list, -2 represents the second-to-last element of the list, and so on.

Syntax

The basic syntax of the redis Ltrim command is as follows:

redis 127.0.0.1:6379> LTRIM KEY_NAME START STOP

Available Version

>= 1.0.0

Return Value

Returns 'ok' when the command executes successfully.

Online Examples

redis 127.0.0.1:6379> RPUSH mylist "hello"
(integer) 1
redis 127.0.0.1:6379> RPUSH mylist "hello"
(integer) 2
redis 127.0.0.1:6379> RPUSH mylist "foo"
(integer) 3
redis 127.0.0.1:6379> RPUSH mylist "bar"
(integer) 4
redis 127.0.0.1:6379> LTRIM mylist 1 -1
OK
redis 127.0.0.1:6379> LRANGE mylist 0 -1
1) "hello"
2) "foo"
3) "bar"

Redis Lists (List)