Returns the first elements in a list after removing it. Deletes the list if the last element was popped.
LPOP
key [count]
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.
One of the following:
Nil reply: if the key does not exist.
Bulk string reply: when called without the count argument, the value of the first element.
Array reply: when called with the count argument, a list of popped elements.
One of the following:
Null reply: if the key does not exist.
Bulk string reply: when called without the count argument, the value of the first element.
Array reply: when called with the count argument, a list of popped elements.
O(N) where N is the number of elements returned
@fast @list @write
127.0.0.1:6379> RPUSH mylist "one" "two" "three" "four" "five"
(integer) 5
127.0.0.1:6379> LPOP mylist
"one"
127.0.0.1:6379> LPOP mylist 2
1) "two"
2) "three"
127.0.0.1:6379> LRANGE mylist 0 -1
1) "four"
2) "five"
count
argument.BLMOVE, BLMPOP, BLPOP, BRPOP, LINDEX, LINSERT, LLEN, LMOVE, LMPOP, LPOS, LPUSH, LPUSHX, LRANGE, LREM, LSET, LTRIM, RPOP, RPUSH, RPUSHX.