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>
91 lines
2.3 KiB
Markdown
91 lines
2.3 KiB
Markdown
---
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id: 587d7db8367417b2b2512ba0
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title: 匹配除了字母和数字的所有符号
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challengeType: 1
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forumTopicId: 301353
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dashedName: match-everything-but-letters-and-numbers
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---
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# --description--
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已经了解到可以使用缩写`\w`来匹配字母和数字`[A-Za-z0-9_]`。不过，有可能想要搜寻的匹配模式是非字母数字字符。
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可以使用`\W`搜寻和`\w`相反的匹配模式。注意，相反匹配模式使用大写字母。此缩写与`[^A-Za-z0-9_]`是一样的。
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```js
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let shortHand = /\W/;
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let numbers = "42%";
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let sentence = "Coding!";
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numbers.match(shortHand); // Returns ["%"]
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sentence.match(shortHand); // Returns ["!"]
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```
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# --instructions--
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使用缩写`\W`来计算不同引号和字符串中非字母数字字符的数量。
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# --hints--
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你的正则表达式应该使用全局状态修正符。
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```js
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assert(nonAlphabetRegex.global);
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```
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你的正则表达式应该在`'The five boxing wizards jump quickly.'`中匹配到 6 个非字母数字字符。
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```js
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assert(
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'The five boxing wizards jump quickly.'.match(nonAlphabetRegex).length == 6
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);
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```
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正则表达式应该使用元字符来匹配非字母字符。
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```js
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assert(/\\W/.test(nonAlphabetRegex.source));
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```
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你的正则表达式应该在`'Pack my box with five dozen liquor jugs.'`中匹配到 8 个非字母数字字符。
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```js
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assert(
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'Pack my box with five dozen liquor jugs.'.match(nonAlphabetRegex).length == 8
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);
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```
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你的正则表达式应该在`'How vexingly quick daft zebras jump!'`中匹配到 6 个非字母数字字符。
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```js
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assert(
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'How vexingly quick daft zebras jump!'.match(nonAlphabetRegex).length == 6
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);
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```
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你的正则表达式应该在`'123 456 7890 ABC def GHI jkl MNO pqr STU vwx YZ.'`中匹配到 12 个非字母数字字符。
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```js
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assert(
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'123 456 7890 ABC def GHI jkl MNO pqr STU vwx YZ.'.match(nonAlphabetRegex)
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.length == 12
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);
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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 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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# --solutions--
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```js
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let quoteSample = "The five boxing wizards_jump quickly.";
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let nonAlphabetRegex = /\W/g; // Change this line
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let result = quoteSample.match(nonAlphabetRegex).length;
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```
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