await redis.zadd(
    "key1", 
    { score: 1, member: "member1" },
)
await redis.zadd(
    "key2",
    { score: 1, member: "member1" },
    { score: 2, member: "member2" },
)

const res = await redis.zunionstore("destination", 2, ["key1", "key2"]);
console.log(res) // 2

​
Arguments

​
destination
string
required

The key to write the union to.

​
keys
integer
required

How many keys to compare.

​
keys
string | string[]
required

The keys to compare.

​
options
​
aggregate
sum | min | max

The aggregation method.

​
weight
number

The weight to apply to each key.

​
weights
number[]

The weights to apply to each key.

​
Response

The number of elements in the resulting set.

await redis.zadd(
    "key1", 
    { score: 1, member: "member1" },
)
await redis.zadd(
    "key2",
    { score: 1, member: "member1" },
    { score: 2, member: "member2" },
)

const res = await redis.zunionstore("destination", 2, ["key1", "key2"]);
console.log(res) // 2