method
Compute the difference between sorted sets and store the result
Computes the difference between the first and all successive sorted sets given by the specified keys and stores the result in destination. Keys that do not exist are considered to be empty sets.
The destination key to store the result
The number of input sorted set keys
The sorted set keys to compare
Promise that resolves with the number of elements in the resulting sorted set
await redis.send("ZADD", ["zset1", "1", "one", "2", "two", "3", "three"]);
await redis.send("ZADD", ["zset2", "1", "one"]);
const count = await redis.zdiffstore("out", 2, "zset1", "zset2");
console.log(count); // 2 (two, three)