71 lines
2.8 KiB
Markdown
71 lines
2.8 KiB
Markdown
---
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id: 587d7db8367417b2b2512ba1
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title: Match All Non-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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The last challenge showed how to search for digits using the shortcut <code>\d</code> with a lowercase <code>d</code>. You can also search for non-digits using a similar shortcut that uses an uppercase <code>D</code> instead.
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The shortcut to look for non-digit characters is <code>\D</code>. This is equal to the character class <code>[^0-9]</code>, which looks for a single character that is not a number between zero and nine.
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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 for non-digits <code>\D</code> to count how many non-digits are in movie titles.
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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 shortcut character to match non-digit characters
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testString: assert(/\\D/.test(noNumRegex.source), 'Your regex should use the shortcut character to match non-digit characters');
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- text: Your regex should use the global flag.
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testString: assert(noNumRegex.global, 'Your regex should use the global flag.');
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- text: Your regex should find no non-digits in <code>"9"</code>.
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testString: assert("9".match(noNumRegex) == null, 'Your regex should find no non-digits in <code>"9"</code>.');
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- text: Your regex should find 6 non-digits in <code>"Catch 22"</code>.
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testString: assert("Catch 22".match(noNumRegex).length == 6, 'Your regex should find 6 non-digits in <code>"Catch 22"</code>.');
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- text: Your regex should find 11 non-digits in <code>"101 Dalmatians"</code>.
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testString: assert("101 Dalmatians".match(noNumRegex).length == 11, 'Your regex should find 11 non-digits in <code>"101 Dalmatians"</code>.');
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- text: Your regex should find 15 non-digits in <code>"One, Two, Three"</code>.
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testString: assert("One, Two, Three".match(noNumRegex).length == 15, 'Your regex should find 15 non-digits in <code>"One, Two, Three"</code>.');
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- text: Your regex should find 12 non-digits in <code>"21 Jump Street"</code>.
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testString: assert("21 Jump Street".match(noNumRegex).length == 12, 'Your regex should find 12 non-digits in <code>"21 Jump Street"</code>.');
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- text: 'Your regex should find 17 non-digits in <code>"2001: A Space Odyssey"</code>.'
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testString: 'assert("2001: A Space Odyssey".match(noNumRegex).length == 17, ''Your regex should find 17 non-digits in <code>"2001: A Space Odyssey"</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 movieName = "2001: A Space Odyssey";
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let noNumRegex = /change/; // Change this line
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let result = movieName.match(noNumRegex).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 movieName = "2001: A Space Odyssey";
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let noNumRegex = /\D/g; // Change this line
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let result = movieName.match(noNumRegex).length;
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```
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</section>
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