LPOP

语法
LPOP key [count]
从以下位置开始可用：
1.0.0
时间复杂度：
O（N），其中 N 是返回的元素数
ACL 类别：
@write, @list, @fast,

删除并返回存储在key.

默认情况下，该命令从列表的开头弹出单个元素。 当提供可选的count参数，则 REPLY 将由 up 组成 自count元素，具体取决于列表的长度。

例子

Give these commands a try in the interactive console:

RPUSH mylist "one" "two" "three" "four" "five" LPOP mylist LPOP mylist 2 LRANGE mylist 0 -1

RESP2 Reply

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.

RESP3 Reply

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.

History

  • Starting with Redis version 6.2.0: Added the count argument.
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