~~~ db.lpush("members", new Date().getTime()); db.llen("members", (err, len)=>{ if(err) throw err; console.log("len: "+len ); if (len > 1000){ db.rpop("members", (err, value)=>{ console.log(value + "被删除"); }); } db.expire("members", 86400); }) ~~~ ``` blpop brpop lindex linsert llen lpop lpush lpushx lrange lrem lset ltrim rpop rpush rpushx ```