56 lines
1.8 KiB
Markdown
56 lines
1.8 KiB
Markdown
|
---
|
|||
|
|
id: 587d7dac367417b2b2512b74
|
|||
|
|
title: Use Dot Notation to Access the Properties of an Object
|
|||
|
|
challengeType: 1
|
|||
|
|
videoUrl: ''
|
|||
|
|
localeTitle: 使用点表示法访问对象的属性
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## Description
|
|||
|
|
<section id="description">最后一个挑战创建了一个具有各种<code>properties</code>的<code>object</code> ，现在您将看到如何访问这些<code>properties</code>的值。这是一个例子： <blockquote>让duck = { <br>名称：“Aflac”， <br> numLegs：2 <br> }; <br>的console.log（duck.name）; <br> //这会将“Aflac”打印到控制台</blockquote>点符号用于<code>object</code>名称<code>duck</code> ，后跟<code>property</code> <code>name</code> ，以访问“Aflac”的值。 </section>
|
|||
|
|
|
|||
|
|
## Instructions
|
|||
|
|
<section id="instructions">将以下<code>dog</code>对象的两个<code>properties</code>打印到控制台。 </section>
|
|||
|
|
|
|||
|
|
## Tests
|
|||
|
|
<section id='tests'>
|
|||
|
|
|
|||
|
|
```yml
|
|||
|
|
tests:
|
|||
|
|
- text: 您应该使用<code>console.log</code>来打印<code>dog</code>对象的<code>name</code>属性的值。
|
|||
|
|
testString: 'assert(/console.log\(.*dog\.name.*\)/g.test(code), "Your should use <code>console.log</code> to print the value for the <code>name</code> property of the <code>dog</code> object.");'
|
|||
|
|
- text: 您应该使用<code>console.log</code>来打印<code>dog</code>对象的<code>numLegs</code>属性的值。
|
|||
|
|
testString: 'assert(/console.log\(.*dog\.numLegs.*\)/g.test(code), "Your should use <code>console.log</code> to print the value for the <code>numLegs</code> property of the <code>dog</code> object.");'
|
|||
|
|
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
</section>
|
|||
|
|
|
|||
|
|
## Challenge Seed
|
|||
|
|
<section id='challengeSeed'>
|
|||
|
|
|
|||
|
|
<div id='js-seed'>
|
|||
|
|
|
|||
|
|
```js
|
|||
|
|
let dog = {
|
|||
|
|
name: "Spot",
|
|||
|
|
numLegs: 4
|
|||
|
|
};
|
|||
|
|
// Add your code below this line
|
|||
|
|
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
</section>
|
|||
|
|
|
|||
|
|
## Solution
|
|||
|
|
<section id='solution'>
|
|||
|
|
|
|||
|
|
```js
|
|||
|
|
// solution required
|
|||
|
|
```
|
|||
|
|
</section>
|