LPOP _key_

RPOP _key_

Atomically return and remove the first (LPOP) or last (RPOP) elementof the list. For example if the list contains the elements "a","b","c" LPOPwill return "a" and the list will become "b","c".

If the key does not exist or the list is already empty the specialvalue 'nil' is returned.

Return value