重庆品牌网站建设,抖音代运营会不会看到以往的数据,国内空间站,xampp php网站模板redis的list类型#xff0c;可以存储双向链表作为value#xff0c;key保留有head和tail指针可以指向双向链表的头和尾#xff0c;因此可以直接从头或尾对list进行操作。 全部命令如下#xff1a; 127.0.0.1:6379 help listBLMOVE source destination LEFT|RIGHT LEFT|…redis的list类型可以存储双向链表作为valuekey保留有head和tail指针可以指向双向链表的头和尾因此可以直接从头或尾对list进行操作。 全部命令如下 127.0.0.1:6379 help listBLMOVE source destination LEFT|RIGHT LEFT|RIGHT timeoutsummary: Pop an element from a list, push it to another list and return it; or block until one is availablesince: 6.2.0BLMPOP timeout numkeys key [key ...] LEFT|RIGHT [COUNT count]summary: Pop elements from a list, or block until one is availablesince: 7.0.0BLPOP key [key ...] timeoutsummary: Remove and get the first element in a list, or block until one is availablesince: 2.0.0BRPOP key [key ...] timeoutsummary: Remove and get the last element in a list, or block until one is availablesince: 2.0.0BRPOPLPUSH source destination timeoutsummary: Pop an element from a list, push it to another list and return it; or block until one is availablesince: 2.2.0LINDEX key indexsummary: Get an element from a list by its indexsince: 1.0.0LINSERT key BEFORE|AFTER pivot elementsummary: Insert an element before or after another element in a listsince: 2.2.0LLEN keysummary: Get the length of a listsince: 1.0.0LMOVE source destination LEFT|RIGHT LEFT|RIGHTsummary: Pop an element from a list, push it to another list and return itsince: 6.2.0LMPOP numkeys key [key ...] LEFT|RIGHT [COUNT count]summary: Pop elements from a listsince: 7.0.0LPOP key [count]summary: Remove and get the first elements in a listsince: 1.0.0LPOS key element [RANK rank] [COUNT num-matches] [MAXLEN len]summary: Return the index of matching elements on a listsince: 6.0.6LPUSH key element [element ...]summary: Prepend one or multiple elements to a listsince: 1.0.0LPUSHX key element [element ...]summary: Prepend an element to a list, only if the list existssince: 2.2.0LRANGE key start stopsummary: Get a range of elements from a listsince: 1.0.0LREM key count elementsummary: Remove elements from a listsince: 1.0.0LSET key index elementsummary: Set the value of an element in a list by its indexsince: 1.0.0LTRIM key start stopsummary: Trim a list to the specified rangesince: 1.0.0RPOP key [count]summary: Remove and get the last elements in a listsince: 1.0.0RPOPLPUSH source destinationsummary: Remove the last element in a list, prepend it to another list and return itsince: 1.2.0RPUSH key element [element ...]summary: Append one or multiple elements to a listsince: 1.0.0RPUSHX key element [element ...]summary: Append an element to a list, only if the list existssince: 2.2.0 下面示例如下 lpushlpush key e1 e2 e3…将数据从头那里推入list lpoplpop key将数据从head弹出 这样2个同向的命令组合起来可以实现一个队列。 反向的命令组合起来可以实现一个栈。 127.0.0.1:6379 lpush k1 a b c d e (integer) 5 127.0.0.1:6379 lpop k1 e 127.0.0.1:6379 lpop k1 d lrange lrange key start end展示key对应的从下标start到end的所有数据 127.0.0.1:6379 lrange k1 0 -1 1) c 2) b 3) a lindexlindex key index 返回key对应的List指定index位置的值 127.0.0.1:6379 lrange k1 0 -1 1) f 2) e 3) d 4) c 5) b 6) a 127.0.0.1:6379 lindex k1 1 e lsetlset key index value在key对应的list中的指定下标处替换为value 127.0.0.1:6379 lset k1 3 x OK 127.0.0.1:6379 lrange k1 0 -1 1) f 2) e 3) d 4) x 5) b 6) a lremlrem key num target删除key对应的list中的target元素如果num大于0从head开始删num个。如果num小于0从tail开始删abs(num)个 127.0.0.1:6379 lrange k3 0 -11) d2) 63) a4) 55) c6) 47) a8) 39) b 10) 2 11) a 12) 1 127.0.0.1:6379 lrem k3 2 a (integer) 2 127.0.0.1:6379 lrange k3 0 -11) d2) 63) 54) c5) 46) 37) b8) 29) a 10) 1 linsertlinsert key before/after element value在key对应的list中在元素element不是下标之前或者之后添加value 127.0.0.1:6379 lrange k3 0 -11) d2) 63) 54) c5) 46) 37) b8) 29) a 10) 1 127.0.0.1:6379 linsert k3 after 6 a (integer) 11 127.0.0.1:6379 lrange k3 0 -11) d2) 63) a4) 55) c6) 47) 38) b9) 2 10) a 11) 1 llenllen key返回长度 redis的List类型有很多关于下标的操作也可以将其抽象为一个数组来使用。 127.0.0.1:6379 llen k3 (integer) 10 blpopblpop key time弹出指定key对应的list中的一个元素如果list没有元素或者不存在key对应的这个list则阻塞等待time指定的时间0表示一直等待单位是s。 127.0.0.1:6379 blpop k1 0阻塞期间如果list有了元素则会中断阻塞并弹出 127.0.0.1:6379 blpop k1 0 1) k1 2) a (35.77s) ltrimltrim key start end删除key对应的list start和end之外的两端的元素 127.0.0.1:6379 lrange k4 0 -1 1) f 2) e 3) d 4) c 5) b 6) a 127.0.0.1:6379 ltrim k4 1 -2 OK 127.0.0.1:6379 lrange k4 0 -1 1) e 2) d 3) c 4) b