59 lines
1.9 KiB
Markdown
59 lines
1.9 KiB
Markdown
---
|
||
id: 587d8254367417b2b2512c70
|
||
title: Create and Add to Sets in ES6
|
||
challengeType: 1
|
||
videoUrl: ''
|
||
localeTitle: 在ES6中创建和添加集
|
||
---
|
||
|
||
## Description
|
||
<section id="description">既然您已经完成了ES5,那么您将在ES6中执行类似的操作。这将相当容易。 ES6包含一个内置的数据结构<code>Set</code>现在包含了您手动编写的许多操作。我们来看看:创建一个新的空集: <code>var set = new Set();</code>您可以使用值创建一个集合: <code>var set = new Set(1);</code>您可以使用数组创建一个集合: <code>var set = new Set([1, 2, 3]);</code>创建集合后,可以使用<code>add</code>方法添加所需的值: <blockquote> var set = new Set([1,2,3]); <br> set.add([4,5,6]); </blockquote>提醒一下,集合是一种不能包含重复值的数据结构: <blockquote> var set = new Set([1,2,3,1,2,3]); <br> // set仅包含[1,2,3] </blockquote></section>
|
||
|
||
## Instructions
|
||
<section id="instructions">在本练习中,返回一个具有以下值的集合: <code>1, 2, 3, 'Taco', 'Cat', 'Awesome'</code> </section>
|
||
|
||
## Tests
|
||
<section id='tests'>
|
||
|
||
```yml
|
||
tests:
|
||
- text: '您的<code>Set</code>应该只包含值<code>1, 2, 3, Taco, Cat, Awesome</code> 。'
|
||
testString: 'assert((function(){var test = checkSet(); return (test.size == 6) && test.has(1) && test.has(2) && test.has(3) && test.has("Taco") && test.has("Cat") && test.has("Awesome");})(), "Your <code>Set</code> should only contain the values <code>1, 2, 3, Taco, Cat, Awesome</code>.");'
|
||
|
||
```
|
||
|
||
</section>
|
||
|
||
## Challenge Seed
|
||
<section id='challengeSeed'>
|
||
|
||
<div id='js-seed'>
|
||
|
||
```js
|
||
function checkSet() {
|
||
var set = new Set([1, 2, 3, 3, 2, 1, 2, 3, 1]);
|
||
// change code below this line
|
||
|
||
// change code above this line
|
||
console.log(set);
|
||
return set;
|
||
}
|
||
|
||
checkSet();
|
||
|
||
```
|
||
|
||
</div>
|
||
|
||
|
||
|
||
</section>
|
||
|
||
## Solution
|
||
<section id='solution'>
|
||
|
||
```js
|
||
// solution required
|
||
```
|
||
</section>
|