ee1e8abd87
* feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
71 lines
1.7 KiB
Markdown
71 lines
1.7 KiB
Markdown
---
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id: 587d7db5367417b2b2512b96
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title: 匹配字母表中的字母
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challengeType: 1
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forumTopicId: 301354
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dashedName: match-letters-of-the-alphabet
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---
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# --description--
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了解了如何使用`字符集`来指定要匹配的一组字符串，但是当需要匹配大量字符（例如，字母表中的每个字母）时，有一种写法可以让实现这个功能变得简短。
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在`字符集`中，可以使用`连字符`（`-`）来定义要匹配的字符范围。
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例如，要匹配小写字母`a`到`e`，你可以使用`[a-e]`。
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```js
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let catStr = "cat";
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let batStr = "bat";
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let matStr = "mat";
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let bgRegex = /[a-e]at/;
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catStr.match(bgRegex); // Returns ["cat"]
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batStr.match(bgRegex); // Returns ["bat"]
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matStr.match(bgRegex); // Returns null
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```
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# --instructions--
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匹配字符串`quoteSample`中的所有字母。
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**注意：**
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一定要同时匹配大小写**字母**。\*\*\*\*
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# --hints--
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你的正则表达式`alphabetRegex`应该匹配 35 项。
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```js
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assert(result.length == 35);
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```
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你的正则表达式`alphabetRegex`应该使用全局标志。
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```js
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assert(alphabetRegex.flags.match(/g/).length == 1);
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```
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你的正则表达式`alphabetRegex`应该使用忽略大小写标志。
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```js
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assert(alphabetRegex.flags.match(/i/).length == 1);
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```
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# --seed--
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## --seed-contents--
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```js
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let quoteSample = "The quick brown fox jumps over the lazy dog.";
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let alphabetRegex = /change/; // Change this line
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let result = alphabetRegex; // Change this line
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```
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# --solutions--
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```js
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let quoteSample = "The quick brown fox jumps over the lazy dog.";
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let alphabetRegex = /[a-z]/gi; // Change this line
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let result = quoteSample.match(alphabetRegex); // Change this line
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```
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