78 lines
1.9 KiB
Markdown
78 lines
1.9 KiB
Markdown
---
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id: 587d7db8367417b2b2512ba3
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title: Match Whitespace
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challengeType: 1
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forumTopicId: 301359
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dashedName: match-whitespace
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---
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# --description--
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The challenges so far have covered matching letters of the alphabet and numbers. You can also match the whitespace or spaces between letters.
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You can search for whitespace using `\s`, which is a lowercase `s`. This pattern not only matches whitespace, but also carriage return, tab, form feed, and new line characters. You can think of it as similar to the character class `[ \r\t\f\n\v]`.
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```js
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let whiteSpace = "Whitespace. Whitespace everywhere!"
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let spaceRegex = /\s/g;
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whiteSpace.match(spaceRegex);
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```
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This `match` call would return `[" ", " "]`.
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# --instructions--
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Change the regex `countWhiteSpace` to look for multiple whitespace characters in a string.
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# --hints--
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Your regex should use the global flag.
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```js
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assert(countWhiteSpace.global);
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```
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Your regex should use the shorthand character `\s` to match all whitespace characters.
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```js
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assert(/\\s/.test(countWhiteSpace.source));
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```
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Your regex should find eight spaces in the string `Men are from Mars and women are from Venus.`
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```js
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assert(
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'Men are from Mars and women are from Venus.'.match(countWhiteSpace).length ==
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8
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);
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```
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Your regex should find three spaces in the string `Space: the final frontier.`
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```js
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assert('Space: the final frontier.'.match(countWhiteSpace).length == 3);
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```
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Your regex should find no spaces in the string `MindYourPersonalSpace`
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```js
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assert('MindYourPersonalSpace'.match(countWhiteSpace) == null);
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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 countWhiteSpace = /change/; // Change this line
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let result = sample.match(countWhiteSpace);
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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 countWhiteSpace = /\s/g;
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let result = sample.match(countWhiteSpace);
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```
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