合并 ES6 地图/集的最简单方法?
有没有一种简单的方法可以将 ES6 Maps 合并在一起(比如 Object.assign)?既然我们在这里，那么 ES6 集合(如 Array.concat)呢?
Is there a simple way to merge ES6 Maps together (like Object.assign)? And while we're at it, what about ES6 Sets (like Array.concat)?
推荐答案
对于套装:
var merged = new Set([...set1, ...set2, ...set3])
对于地图:
var merged = new Map([...map1, ...map2, ...map3])
请注意，如果多个映射具有相同的键，则合并映射的值将是具有该键的最后一个合并映射的值.
Note that if multiple maps have the same key, the value of the merged map will be the value of the last merging map with that key.
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