redis基础数据格式 - 列表

1. 右进左出：队列

> rpush languages php java
(integer) 2
> rpush languages go
(integer) 3

> llen languages
(integer) 3
> lpop languages
"php"
> lpop languages
"java"

2. 右进右出：栈

> rpush languages php java
(integer) 2
> rpush languages go
(integer) 3

> llen languages
(integer) 3
> lpop languages
"go"
> lpop languages
"java"

3. 读取，截取

> rpush languages php java go
(integer) 3

> llen languages
(integer) 3
> lrange languages 0 -1  //显示所有队列数据
"php"
"java"
"go"
> lindex languages 1   //显示index 为1的
"java"

> ltrim languages 1 -1
"OK"

> lrange languages 0 -1
"java"
"go"

> ltrim languages 1 0  //清空队列
"OK"