如何将值数组添加到 Set
将数组的所有值添加到 Set 的老式方法是:
The old school way of adding all values of an array into the Set is:
// for the sake of this example imagine this set was created somewhere else
// and I cannot construct a new one out of an array
let mySet = new Set()
for(let item of array) {
mySet.add(item)
}
有没有更优雅的方式来做到这一点?也许是 mySet.add(array) 或 mySet.add(...array)?
Is there a more elegant way of doing this? Maybe mySet.add(array) or mySet.add(...array)?
PS:我知道两者都不起作用
PS: I know both do not work
推荐答案
虽然 Set API 仍然非常简约，但您可以使用 Array.prototype.forEach 并稍微缩短您的代码:
While Set API is still very minimalistic, you can use Array.prototype.forEach and shorten your code a bit:
array.forEach(item => mySet.add(item))
// alternative, without anonymous arrow function
array.forEach(mySet.add, mySet)
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