lpuhx


lpush(left push exist) 列表头部插入,列表不存在时,会失败

127.0.0.1:6379> keys *
1) "taskList"
2) "count"
127.0.0.1:6379> lpushx test 1
(integer) 0 失败,因为test列表不存在
127.0.0.1:6379> lpush test 1
(integer) 1
127.0.0.1:6379> keys *
1) "taskList"
2) "count"
3) "test"

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