Javascript 如何对 ES6 `Set` 进行排序？
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How can I sort an ES6 `Set`?
提问by ericsoco
new Set(['b', 'a', 'c']).sort()throws TypeError: set.sort is not a function. How can I sort a Setto ensure a particular iteration order?
new Set(['b', 'a', 'c']).sort()抛出TypeError: set.sort is not a function。如何对 aSet进行排序以确保特定的迭代顺序？
回答by Benjamin Gruenbaum
A set is not an ordered abstract data structure.
集合不是有序的抽象数据结构。
A Sethowever always has the same iteration order - element insertion order [1], so when you iterate it (by an iterating method, by calling Symbol.iterator, or by a for.. of loop) you can always expect that.
Set然而，A始终具有相同的迭代顺序 - 元素插入顺序 [1]，因此当您对其进行迭代时（通过迭代方法、调用Symbol.iterator或 for.. of 循环），您总是可以期待这一点。
You can always convert the set to an array and sort that.
您始终可以将集合转换为数组并对其进行排序。
Array.from(new Set(["b","a","c"])).sort();
[...(new Set(["b","a","c"]))].sort(); // with spread.
[1] forEachand CreateSetIterator
