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LPOP

Removes and returns the first count elements from the list stored at key. If the list does not exist or is empty, nil is returned.

Syntax​

LPOP key [count]

Details​

  • Available since: 1.0.0
  • Time complexity: O(1) for every element to be removed, O(N) overall where N is the number of elements returned.
  • ACL categories: @write, @list, @fast

Example​

Assume we have a list called mylist with elements "a", "b", "c", "d", and "e":

RPUSH mylist "a"
RPUSH mylist "b"
RPUSH mylist "c"
RPUSH mylist "d"
RPUSH mylist "e"

Now, let's remove the first element from mylist:

LPOP mylist

This will output:

"a"

RESP2/RESP3 Reply​

Bulk string reply: the element removed from the list, or nil if the list is empty.