62 lines
3.3 KiB
Markdown
62 lines
3.3 KiB
Markdown
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---
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id: 587d7db8367417b2b2512ba0
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title: Match Everything But Letters and Numbers
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challengeType: 1
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videoUrl: ''
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localeTitle: 匹配一切，但字母和数字
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---
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## Description
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<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>
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## Instructions
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<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>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: 你的正则表达式应该使用全局标志。
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testString: 'assert(nonAlphabetRegex.global, "Your regex should use the global flag.");'
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- 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> 。
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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>.");'
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- text: 你的正则表达式应该使用速记字符。
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testString: 'assert(/\\W/.test(nonAlphabetRegex.source), "Your regex should use the shorthand character to match characters which are non-alphanumeric.");'
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- 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>
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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>");'
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- 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>
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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>");'
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- 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>
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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>");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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let quoteSample = "The five boxing wizards jump quickly.";
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let nonAlphabetRegex = /change/; // Change this line
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let result = quoteSample.match(nonAlphabetRegex).length;
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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