05f73ca409
* fix: convert js algorithms and data structures * fix: revert some blocks back to blockquote * fix: reverted comparison code block to blockquotes * fix: change js to json Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com> * fix: convert various section to triple backticks * fix: Make the formatting consistent for comparisons
75 lines
3.1 KiB
Markdown
75 lines
3.1 KiB
Markdown
---
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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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---
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## Description
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<section id='description'>
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You've learned that you can use a shortcut to match alphanumerics <code>[A-Za-z0-9_]</code> using <code>\w</code>. A natural pattern you might want to search for is the opposite of alphanumerics.
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You can search for the opposite of the <code>\w</code> with <code>\W</code>. Note, the opposite pattern uses a capital letter. This shortcut is the same as <code>[^A-Za-z0-9_]</code>.
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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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</section>
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## Instructions
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<section id='instructions'>
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Use the shorthand character class <code>\W</code> to count the number of non-alphanumeric characters in various quotes and strings.
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</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: Your regex should use the global flag.
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testString: assert(nonAlphabetRegex.global, 'Your regex should use the global flag.');
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- text: Your regex should find 6 non-alphanumeric characters in <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: Your regex should use the shorthand character.
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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: Your regex should find 8 non-alphanumeric characters in <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: Your regex should find 6 non-alphanumeric characters in <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: 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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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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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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</section>
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