Skip to main content

LPOP

Syntax​

LPOP key [count]

Time complexity: O(N) where N is the number of elements returned

ACL categories: @write, @list, @fast

Removes and returns the first elements of the list stored at key.

By default, the command pops a single element from the beginning of the list. When provided with the optional count argument, the reply will consist of up to count elements, depending on the list's length.

Return​

When called without the count argument:

Bulk string reply: the value of the first element, or nil when key does not exist.

When called with the count argument:

Array reply: list of popped elements, or nil when key does not exist.

Examples​

dragonfly> RPUSH mylist "one" "two" "three" "four" "five"
(integer) 5
dragonfly> LPOP mylist
"one"
dragonfly> LPOP mylist 2
1) "two"
2) "three"
dragonfly> LRANGE mylist 0 -1
1) "four"
2) "five"