79 lines
2.0 KiB
Markdown
79 lines
2.0 KiB
Markdown
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---
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id: 587d7db9367417b2b2512ba4
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title: 匹配非空白字符
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challengeType: 1
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forumTopicId: 18210
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dashedName: match-non-whitespace-characters
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---
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# --description--
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已經學會了如何使用帶有小寫 `s` 的縮寫 `\s` 來搜尋空白字符。 還可以搜尋除了空格之外的所有內容。
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使用 `\S` 搜尋非空白字符，其中 `s` 是大寫。 此匹配模式將不匹配空格、回車符、製表符、換頁符和換行符。 可以認爲這類似於元字符 `[^ \r\t\f\n\v]`。
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```js
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let whiteSpace = "Whitespace. Whitespace everywhere!"
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let nonSpaceRegex = /\S/g;
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whiteSpace.match(nonSpaceRegex).length;
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```
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返回值的 `.length` 應該是 `32`。
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# --instructions--
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修改正則表達式 `countNonWhiteSpace` 以查找字符串中的多個非空字符。
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# --hints--
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您的正則表達式應該使用全局標識。
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```js
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assert(countNonWhiteSpace.global);
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```
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你的正則表達式應該使用簡寫字符 `\S` 來匹配所有非空白字符。
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```js
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assert(/\\S/.test(countNonWhiteSpace.source));
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```
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您的正則表達式應該在字符串 `Men are from Mars and women are from Venus.` 中找到 35 個非空格字符。
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```js
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assert(
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'Men are from Mars and women are from Venus.'.match(countNonWhiteSpace)
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.length == 35
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);
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```
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你的正則表達式應該在 `Space: the final frontier.` 中匹配到 23 個非空白字符。
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```js
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assert('Space: the final frontier.'.match(countNonWhiteSpace).length == 23);
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```
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你的正則表達式應該在 `MindYourPersonalSpace` 中匹配到 21 個非空白字符。
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```js
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assert('MindYourPersonalSpace'.match(countNonWhiteSpace).length == 21);
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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 sample = "Whitespace is important in separating words";
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let countNonWhiteSpace = /change/; // Change this line
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let result = sample.match(countNonWhiteSpace);
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```
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# --solutions--
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```js
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let sample = "Whitespace is important in separating words";
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let countNonWhiteSpace = /\S/g; // Change this line
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let result = sample.match(countNonWhiteSpace);
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```
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