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Redis 集合(Set)

sadd

sadd sets "a"//增加
sadd sets "b"
sadd sets "c"

srem

srem sets "c"//移除

sismember

sismember sets "a" => 1//查看有无些元素
sismember sets "d" => 0

smembers

smembers sets =>["a", "b"]//查看所有元素

sunion

sadd anothers "a"//新增一个set
sadd anothers "d"
sunion sets anothers => ["a", "b","d"]//把两set合并

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