freeCodeCamp/curriculum/challenges/chinese/10-coding-interview-prep/data-structures/perform-a-union-on-two-sets.md

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---
id: 587d8253367417b2b2512c6c
title: 在两个集上执行联合
challengeType: 1
videoUrl: ''
---
# --description--
在本练习中,我们将对两组数据执行联合。我们将在我们的`Set`数据结构上创建一个名为`union` 。此方法应将另一个`Set`作为参数,并返回两个集合的`union`集,不包括任何重复值。例如,如果`setA = ['a','b','c']`和`setB = ['a','b','d','e']` 则setA和setB的并集为 `setA.union(setB) = ['a', 'b', 'c', 'd', 'e']`
# --hints--
你的`Set`类应该有一个`union`方法。
```js
assert(
(function () {
var test = new Set();
return typeof test.union === 'function';
})()
);
```
收回了适当的收藏
```js
assert(
(function () {
var setA = new Set();
var setB = new Set();
setA.add('a');
setA.add('b');
setA.add('c');
setB.add('c');
setB.add('d');
var unionSetAB = setA.union(setB);
var final = unionSetAB.values();
return (
final.indexOf('a') !== -1 &&
final.indexOf('b') !== -1 &&
final.indexOf('c') !== -1 &&
final.indexOf('d') !== -1 &&
final.length === 4
);
})()
);
```
# --solutions--