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Clustercluster addslots(集群 槽位)cluster count failure reports(集群计数失败报告)cluster countkeysinslotcluster delslotscluster failovercluster forgetcluster getkeysinslotcluster infocluster keyslot(集群键槽)cluster meetcluster nodes(集群节点)cluster replicate(集群复制)cluster reset(集群重置)cluster saveconfigcluster set config epochcluster setslotcluster slavescluster slotsreadonlyreadwriteConnectionauthechopingquitselectswapdbGeogeoaddgeodistgeohashgeoposgeoradiusgeoradiusbymemberHasheshdelhexistshgethgetallhincrbyhincrbyfloathkeyshlenhmgethmsethscanhsethsetnxhstrlenhvalsHyperLogLogpfaddpfcountpfmergeKeysdeldumpexistsexpireexpireatkeysmigratemoveobjectpersistpexpirepexpireatpttlrandomkeyrenamerenamenxrestorescansorttouchttltypeunlinkwaitListsblpopbrpopbrpoplpushlindexlinsertllenlpoplpushlpushxlrangelremlsetltrimrpoprpoplpushrpushrpushxPub/SubpsubscribepublishpubsubpunsubscribesubscribeunsubscribeScriptingevalevalshascript debugscript existsscript flushscript killscript loadServerbgrewriteaofbgsaveclient getnameclient killclient listclient pauseclient replyclient setnamecommandcommand countcommand getkeyscommand infoconfig getconfig resetstatconfig rewriteconfig setdbsizedebug objectdebug segfaultflushallflushdbinfolastsavemonitorrolesaveshutdownslaveofslowlogtimeSetssaddscardsdiffsdiffstoresintersinterstoresismembersmemberssmovespopsrandmembersremsscansunionsunionstoreSorted SetszaddzcardzcountzincrbyzinterstorezlexcountzrangezrangebylexzrangebyscorezrankzremzremrangebylexzremrangebyrankzremrangebyscorezrevrangezrevrangebylexzrevrangebyscorezrevrankzscanzscorezunionstoreStringsappendbitcountbitfieldbitopbitposdecrdecrbygetgetbitgetrangegetsetincrincrbyincrbyfloatmgetmsetmsetnxpsetexsetsetbitsetexsetnxsetrangestrlenTransactionsdiscardexecmultiunwatchwatch
文字

LREM key count value

自1.0.0起可用。

时间复杂度: O(N)其中N是列表的长度。

从存储在列表中count的元素中删除第一次出现的元素。这个论点以如下方式影响着操作:valuekeycount

  • count > 0:删除相当于value从头到尾移动的元素。

  • count < 0:删除等于value从尾部移动到头部的元素。

  • count = 0:删除所有等于的元素value

例如,LREM list -2 "hello"将删除"hello"存储在列表中的最后两个匹配项list

请注意,不存在的键被视为空列表,所以当key不存在时,该命令将始终返回0

返回值

整数回复:删除的元素数量。

例子

redis>  RPUSH mylist "hello" (integer) 1 

redis>  RPUSH mylist "hello" (integer) 2 

redis>  RPUSH mylist "foo" (integer) 3 

redis>  RPUSH mylist "hello" (integer) 4 

redis>  LREM mylist -2 "hello" (integer) 2 

redis>  LRANGE mylist 0 -1 1) "hello" 2) "foo"

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