Removes and returns the last element in a list. Blocks until an element is available otherwise. Deletes the list if the last element was popped.
BRPOP
key [key…]
timeout
BRPOP
is a blocking list pop primitive. It is the
blocking version of RPOP
because it blocks the connection
when there are no elements to pop from any of the given lists. An
element is popped from the tail of the first list that is non-empty,
with the given keys being checked in the order that they are given.
See the BLPOP documentation for the exact
semantics, since BRPOP
is identical to BLPOP
with the only difference being that it pops elements from the tail of a
list instead of popping from the head.
One of the following:
Nil reply: no element could be popped and the timeout expired.
Array reply: the key from which the element was popped and the value of the popped element
One of the following:
Null reply: no element could be popped and the timeout expired.
Array reply: the key from which the element was popped and the value of the popped element
O(N) where N is the number of provided keys.
@blocking @list @slow @write
127.0.0.1:6379> DEL list1 list2
(integer) 0
127.0.0.1:6379> RPUSH list1 a b c
(integer) 3
127.0.0.1:6379> BRPOP list1 list2 0
1) "list1"
2) "c"
timeout
is interpreted as a double instead of an
integer.BLMOVE, BLMPOP, BLPOP, LINDEX, LINSERT, LLEN, LMOVE, LMPOP, LPOP, LPOS, LPUSH, LPUSHX, LRANGE, LREM, LSET, LTRIM, RPOP, RPUSH, RPUSHX.