62 lines
3.3 KiB
Markdown
62 lines
3.3 KiB
Markdown
---
|
||
id: 587d7db8367417b2b2512ba0
|
||
title: Match Everything But Letters and Numbers
|
||
challengeType: 1
|
||
videoUrl: ''
|
||
localeTitle: 匹配一切，但字母和数字
|
||
---
|
||
|
||
## Description
|
||
<section id="description">您已经了解到可以使用快捷键来匹配使用<code>\w</code>字母数字<code>[A-Za-z0-9_]</code> 。您可能想要搜索的自然模式与字母数字相反。您可以使用<code>\W</code>搜索<code>\w</code>的反面。注意，相反的模式使用大写字母。此快捷方式与<code>[^A-Za-z0-9_]</code> 。 <blockquote>让shortHand = / \ W /; <br>让数字=“42％”; <br> let sentence =“Coding！”; <br> numbers.match（简写）; //返回[“％”] <br> sentence.match（简写）; //返回[“！”] <br></blockquote></section>
|
||
|
||
## Instructions
|
||
<section id="instructions">使用速记字符类<code>\W</code>来计算各种引号和字符串中的非字母数字字符数。 </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(nonAlphabetRegex.global, "Your regex should use the global flag.");'
|
||
- text: 你的正则表达式应该在<code>"The five boxing wizards jump quickly."</code>找到6个非字母数字字符<code>"The five boxing wizards jump quickly."</code> 。
|
||
testString: 'assert("The five boxing wizards jump quickly.".match(nonAlphabetRegex).length == 6, "Your regex should find 6 non-alphanumeric characters in <code>"The five boxing wizards jump quickly."</code>.");'
|
||
- text: 你的正则表达式应该使用速记字符。
|
||
testString: 'assert(/\\W/.test(nonAlphabetRegex.source), "Your regex should use the shorthand character to match characters which are non-alphanumeric.");'
|
||
- text: 你的正则表达式应该在<code>"Pack my box with five dozen liquor jugs."</code>找到8个非字母数字字符<code>"Pack my box with five dozen liquor jugs."</code>
|
||
testString: 'assert("Pack my box with five dozen liquor jugs.".match(nonAlphabetRegex).length == 8, "Your regex should find 8 non-alphanumeric characters in <code>"Pack my box with five dozen liquor jugs."</code>");'
|
||
- text: 你的正则表达式应该在<code>"How vexingly quick daft zebras jump!"</code>找到6个非字母数字字符<code>"How vexingly quick daft zebras jump!"</code>
|
||
testString: 'assert("How vexingly quick daft zebras jump!".match(nonAlphabetRegex).length == 6, "Your regex should find 6 non-alphanumeric characters in <code>"How vexingly quick daft zebras jump!"</code>");'
|
||
- text: 你的正则表达式应该在<code>"123 456 7890 ABC def GHI jkl MNO pqr STU vwx YZ."</code>找到12个非字母数字字符<code>"123 456 7890 ABC def GHI jkl MNO pqr STU vwx YZ."</code>
|
||
testString: 'assert("123 456 7890 ABC def GHI jkl MNO pqr STU vwx YZ.".match(nonAlphabetRegex).length == 12, "Your regex should find 12 non-alphanumeric characters in <code>"123 456 7890 ABC def GHI jkl MNO pqr STU vwx YZ."</code>");'
|
||
|
||
```
|
||
|
||
</section>
|
||
|
||
## Challenge Seed
|
||
<section id='challengeSeed'>
|
||
|
||
<div id='js-seed'>
|
||
|
||
```js
|
||
let quoteSample = "The five boxing wizards jump quickly.";
|
||
let nonAlphabetRegex = /change/; // Change this line
|
||
let result = quoteSample.match(nonAlphabetRegex).length;
|
||
|
||
```
|
||
|
||
</div>
|
||
|
||
|
||
|
||
</section>
|
||
|
||
## Solution
|
||
<section id='solution'>
|
||
|
||
```js
|
||
// solution required
|
||
```
|
||
</section>
|