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Cluster cluster addslots（集群 槽位） cluster count failure reports（集群計(jì)數(shù)失敗報(bào)告） cluster countkeysinslot cluster delslots cluster failover cluster forget cluster getkeysinslot cluster info cluster keyslot（集群鍵槽） cluster meet cluster nodes（集群節(jié)點(diǎn)） cluster replicate（集群復(fù)制） cluster reset（集群重置） cluster saveconfig cluster set config epoch cluster setslot cluster slaves cluster slots readonly readwrite Connection auth echo ping quit select swapdb Geo geoadd geodist geohash geopos georadius georadiusbymember Hashes hdel hexists hget hgetall hincrby hincrbyfloat hkeys hlen hmget hmset hscan hset hsetnx hstrlen hvals HyperLogLog pfadd pfcount pfmerge Keys del dump exists expire expireat keys migrate move object persist pexpire pexpireat pttl randomkey rename renamenx restore scan sort touch ttl type unlink wait Lists blpop brpop brpoplpush lindex linsert llen lpop lpush lpushx lrange lrem lset ltrim rpop rpoplpush rpush rpushx Pub/Sub psubscribe publish pubsub punsubscribe subscribe unsubscribe Scripting eval evalsha script debug script exists script flush script kill script load Server bgrewriteaof bgsave client getname client kill client list client pause client reply client setname command command count command getkeys command info config get config resetstat config rewrite config set dbsize debug object debug segfault flushall flushdb info lastsave monitor role save shutdown slaveof slowlog time Sets sadd scard sdiff sdiffstore sinter sinterstore sismember smembers smove spop srandmember srem sscan sunion sunionstore Sorted Sets zadd zcard zcount zincrby zinterstore zlexcount zrange zrangebylex zrangebyscore zrank zrem zremrangebylex zremrangebyrank zremrangebyscore zrevrange zrevrangebylex zrevrangebyscore zrevrank zscan zscore zunionstore Strings append bitcount bitfield bitop bitpos decr decrby get getbit getrange getset incr incrby incrbyfloat mget mset msetnx psetex set setbit setex setnx setrange strlen Transactions discard exec multi unwatch watch
characters 

LREM key count value

自1.0.0起可用。

時(shí)間復(fù)雜度： O（N）其中N是列表的長(zhǎng)度。

從存儲(chǔ)在列表中count的元素中刪除第一次出現(xiàn)的元素。這個(gè)論點(diǎn)以如下方式影響著操作：valuekeycount

  • count > 0：刪除相當(dāng)于value從頭到尾移動(dòng)的元素。

  • count < 0：刪除等于value從尾部移動(dòng)到頭部的元素。

  • count = 0：刪除所有等于的元素value。

例如，LREM list -2 "hello"將刪除"hello"存儲(chǔ)在列表中的最后兩個(gè)匹配項(xiàng)list。

請(qǐng)注意，不存在的鍵被視為空列表，所以當(dāng)key不存在時(shí)，該命令將始終返回0。

返回值

整數(shù)回復(fù)：刪除的元素?cái)?shù)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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