60 lines
2.5 KiB
Markdown
60 lines
2.5 KiB
Markdown
|
---
|
|||
|
|
id: 587d7db8367417b2b2512ba3
|
|||
|
|
title: Match Whitespace
|
|||
|
|
challengeType: 1
|
|||
|
|
videoUrl: ''
|
|||
|
|
localeTitle: 匹配空白
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## Description
|
|||
|
|
<section id="description">迄今为止的挑战包括匹配的字母和数字字母。您还可以匹配字母之间的空格或空格。您可以使用<code>\s</code>搜索空格，这是一个小写的<code>s</code> 。此模式不仅匹配空格，还匹配回车符，制表符，换页符和换行符。你可以认为它类似于字符类<code>[ \r\t\f\n\v]</code> 。 <blockquote>让whiteSpace =“空白。到处都是空白！” <br>让spaceRegex = / \ s / g; <br> whiteSpace.match（spaceRegex）; <br> //返回[“”，“”] <br></blockquote></section>
|
|||
|
|
|
|||
|
|
## Instructions
|
|||
|
|
<section id="instructions">更改正则表达式<code>countWhiteSpace</code>以查找字符串中的多个空格字符。 </section>
|
|||
|
|
|
|||
|
|
## Tests
|
|||
|
|
<section id='tests'>
|
|||
|
|
|
|||
|
|
```yml
|
|||
|
|
tests:
|
|||
|
|
- text: 你的正则表达式应该使用全局标志。
|
|||
|
|
testString: 'assert(countWhiteSpace.global, "Your regex should use the global flag.");'
|
|||
|
|
- text: 你的正则表达式应该使用速记字符
|
|||
|
|
testString: 'assert(/\\s/.test(countWhiteSpace.source), "Your regex should use the shorthand character <code>\s</code> to match all whitespace characters.");'
|
|||
|
|
- text: 你的正则表达式应该在<code>"Men are from Mars and women are from Venus."</code>找到八个空格<code>"Men are from Mars and women are from Venus."</code>
|
|||
|
|
testString: 'assert("Men are from Mars and women are from Venus.".match(countWhiteSpace).length == 8, "Your regex should find eight spaces in <code>"Men are from Mars and women are from Venus."</code>");'
|
|||
|
|
- text: '你的正则表达式应该在<code>"Space: the final frontier."</code>找到三个空格<code>"Space: the final frontier."</code>'
|
|||
|
|
testString: 'assert("Space: the final frontier.".match(countWhiteSpace).length == 3, "Your regex should find three spaces in <code>"Space: the final frontier."</code>");'
|
|||
|
|
- text: ''
|
|||
|
|
testString: 'assert("MindYourPersonalSpace".match(countWhiteSpace) == null, "Your regex should find no spaces in <code>"MindYourPersonalSpace"</code>");'
|
|||
|
|
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
</section>
|
|||
|
|
|
|||
|
|
## Challenge Seed
|
|||
|
|
<section id='challengeSeed'>
|
|||
|
|
|
|||
|
|
<div id='js-seed'>
|
|||
|
|
|
|||
|
|
```js
|
|||
|
|
let sample = "Whitespace is important in separating words";
|
|||
|
|
let countWhiteSpace = /change/; // Change this line
|
|||
|
|
let result = sample.match(countWhiteSpace);
|
|||
|
|
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
</section>
|
|||
|
|
|
|||
|
|
## Solution
|
|||
|
|
<section id='solution'>
|
|||
|
|
|
|||
|
|
```js
|
|||
|
|
// solution required
|
|||
|
|
```
|
|||
|
|
</section>
|