Redis Lists: RPUSHX
RPUSHX key value
Redis RPUSHX command is used to insert a value at the tail of the list stored at key, only if a key already exists and holds a list. In contrary to RPUSH, no operation will be performed when a key does not yet exist.
Syntax:
RPUSHX KEY_NAME VALUE1..VALUEN
Available since
2.2.0.
Return Value
Integer replies the length of the list after the push operation.
Return Value Type
Integer
Example: Redis RPUSHX
127.0.0.1:6379> del mycolor1 (integer) 1 127.0.0.1:6379> RPUSH mycolor1 white (integer) 1 127.0.0.1:6379> RPUSHX mycolor1 black (integer) 2 127.0.0.1:6379> RPUSHX mycolor1 red (integer) 3 127.0.0.1:6379> RPUSHX mycolor2 blue (integer) 0 The key mycolor2 not exists, so return 0 127.0.0.1:6379> EXISTS mycolor2 (integer) 0 127.0.0.1:6379> LRANGE mycolor1 0 -1 1) "white" 2) "black" 3) "red"
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