60 lines
2.2 KiB
Markdown
60 lines
2.2 KiB
Markdown
---
|
||
id: 56533eb9ac21ba0edf2244b5
|
||
title: Escaping Literal Quotes in Strings
|
||
challengeType: 1
|
||
videoUrl: ''
|
||
localeTitle: 逃避字符串中的字面引用
|
||
---
|
||
|
||
## Description
|
||
<section id="description">在定义字符串时，必须以单引号或双引号开头和结尾。当你需要一个文字报价会发生什么： <code>"</code>还是<code>'</code> ？你的字符串里面在JavaScript中，你可以放置一个<dfn>反斜杠</dfn> （从考虑到它作为字符串报价的最终<dfn>逃脱</dfn>报价<code>\</code>在引号前）。 <code>var sampleStr = "Alan said, \"Peter is learning JavaScript\".";</code>这告诉JavaScript，以下引用不是字符串的结尾，而是应该出现在字符串中。所以如果要将它打印到控制台，你会得到： <code>Alan said, "Peter is learning JavaScript".</code> </section>
|
||
|
||
## Instructions
|
||
<section id="instructions">使用<dfn>反斜杠</dfn>将字符串分配给<code>myStr</code>变量，这样如果要将其打印到控制台，您会看到： <code>I am a "double quoted" string inside "double quotes".</code> </section>
|
||
|
||
## Tests
|
||
<section id='tests'>
|
||
|
||
```yml
|
||
tests:
|
||
- text: 您应该使用两个双引号（ <code>"</code> ）和四个转义双引号（ <code>\"</code> ）。
|
||
testString: 'assert(code.match(/\\"/g).length === 4 && code.match(/[^\\]"/g).length === 2, "You should use two double quotes (<code>"</code>) and four escaped double quotes (<code>\"</code>).");'
|
||
- text: 变量myStr应该包含字符串： <code>I am a "double quoted" string inside "double quotes".</code>
|
||
testString: 'assert(myStr === "I am a \"double quoted\" string inside \"double quotes\".", "Variable myStr should contain the string: <code>I am a "double quoted" string inside "double quotes".</code>");'
|
||
|
||
```
|
||
|
||
</section>
|
||
|
||
## Challenge Seed
|
||
<section id='challengeSeed'>
|
||
|
||
<div id='js-seed'>
|
||
|
||
```js
|
||
var myStr = ""; // Change this line
|
||
|
||
```
|
||
|
||
</div>
|
||
|
||
|
||
### After Test
|
||
<div id='js-teardown'>
|
||
|
||
```js
|
||
console.info('after the test');
|
||
```
|
||
|
||
</div>
|
||
|
||
</section>
|
||
|
||
## Solution
|
||
<section id='solution'>
|
||
|
||
```js
|
||
// solution required
|
||
```
|
||
</section>
|