Redis数据库(list类型)
list是一个链表结构,主要功能是push,pop,获取一个范围内所有值等等,操作中key可以理解为链表的名字。Redis的list类型实际上就
list是一个链表结构,主要功能是push,pop,获取一个范围内所有值等等,操作中key可以理解为链表的名字。
Redis的list类型实际上就是每个子元素都是string类型的双向链表,我们可以通过push,pop命令操作从链表的头部或者尾部添加删除元素,这样list既可以作为栈,又可以作为队列。
list常见的操作:
(1)lpush和rpush
lpush表示在key对应的list的头部添加字符串元素。例如:lpush list Hello
rpush表示在key对应的list的尾部添加字符串元素。例如:rpush list World
(2)lpop和rpop
lpop代表从list的头部删除元素,并返回元素。
rpop代表从list的头部删除元素,并返回元素。
(3)lrange
取出指定范围内的元素。例如:lrange list 0 -1,0是第一个元素的下标,-1是最后一个元素的下标。
(4)linsert
在key对应的list的特定位置前或后添加字符串,例如:
linsert list before Hello Redis 表示在list链表的Hello前面插入一个元素Redis
(5)lset
设定list中指定下标的元素值,例如:lset list 1 Database,意思是把list中下标为1的元素替换为
Database。
(6)lrem
从key对应的list中删除n个和value相同的元素,如果n
例如:lrem list 1 Hello
(7)ltrim
保留指定key范围内的数据。比如:ltrim list 1 -1,相当于只保留下表从1开始到最后的元素的值。
(8)rpoplpush
从第一个list的尾部移除元素并添加到第二个list的头部。例如:
(9)lindex
返回名称为key的list中index位置的元素。例如:lindex list 1,返回list中下标为1的元素。
(10)llen
返回key对应list的长度。
Ubuntu 14.04下Redis安装及简单测试
Redis集群明细文档
Ubuntu 12.10下安装Redis(图文详解)+ Jedis连接Redis
Redis系列-安装部署维护篇
CentOS 6.3安装Redis
Redis安装部署学习笔记
Redis配置文件redis.conf 详解
Redis 的详细介绍:请点这里
Redis 的下载地址:请点这里
本文永久更新链接地址:
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