Redis的底层类型之list

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lists

Redis lists are linked lists of string values. Redis lists are frequently used to:
Redis 列表是由字符串值组成的链接列表。Redis 列表经常用于:

• Implement stacks and queues.实现堆栈和队列。
• Build queue management for background worker systems.构建后台工作者系统的队列管理。

常用命令

• LPUSH

adds a new element to the head of a list; RPUSH adds to the tail.

• LPOP

removes and returns an element from the head of a list; RPOP does the same but from the tails of a list.

• LLEN
• LMOVE

LMOVE source destination <LEFT | RIGHT> <LEFT | RIGHT>

atomically moves elements from one list to another.

• LTRIM

  LTRIM key start stop

  Trim an existing list so that it will contain only the specified range of elements specified.

• BLPOP
• BLMOVE

如果源列表为空，这两个指令会阻塞等待