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iredis/iredis/data/commands/zdiff.md

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This command is similar to `ZDIFFSTORE`, but instead of storing the resulting
sorted set, it is returned to the client.
@return
@array-reply: the result of the difference (optionally with their scores, in
case the `WITHSCORES` option is given).
@examples
```cli
ZADD zset1 1 "one"
ZADD zset1 2 "two"
ZADD zset1 3 "three"
ZADD zset2 1 "one"
ZADD zset2 2 "two"
ZDIFF 2 zset1 zset2
ZDIFF 2 zset1 zset2 WITHSCORES
```