79d9012432
* fix(curriculum): tests quotes * fix(curriculum): fill seed-teardown * fix(curriculum): fix tests and remove unneeded seed-teardown
68 lines
2.6 KiB
Markdown
68 lines
2.6 KiB
Markdown
---
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id: 5d712346c441eddfaeb5bdef
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title: Match All 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 shortcuts for common string patterns like alphanumerics. Another common pattern is looking for just digits or numbers.
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The shortcut to look for digit characters is <code>\d</code>, with a lowercase <code>d</code>. This is equal to the character class <code>[0-9]</code>, which looks for a single character of any 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 <code>\d</code> to count how many digits are in movie titles. Written out numbers ("six" instead of 6) do not count.
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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 digit characters
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testString: assert(/\\d/.test(numRegex.source), 'Your regex should use the shortcut character to match digit characters');
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- text: Your regex should use the global flag.
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testString: assert(numRegex.global, 'Your regex should use the global flag.');
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- text: Your regex should find 1 digit in <code>"9"</code>.
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testString: assert("9".match(numRegex).length == 1, 'Your regex should find 1 digit in <code>"9"</code>.');
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- text: Your regex should find 2 digits in <code>"Catch 22"</code>.
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testString: assert("Catch 22".match(numRegex).length == 2, 'Your regex should find 2 digits in <code>"Catch 22"</code>.');
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- text: Your regex should find 3 digits in <code>"101 Dalmatians"</code>.
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testString: assert("101 Dalmatians".match(numRegex).length == 3, 'Your regex should find 3 digits in <code>"101 Dalmatians"</code>.');
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- text: Your regex should find no digits in <code>"One, Two, Three"</code>.
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testString: assert("One, Two, Three".match(numRegex) == null, 'Your regex should find no digits in <code>"One, Two, Three"</code>.');
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- text: Your regex should find 2 digits in <code>"21 Jump Street"</code>.
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testString: assert("21 Jump Street".match(numRegex).length == 2, 'Your regex should find 2 digits in <code>"21 Jump Street"</code>.');
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- text: 'Your regex should find 4 digits in <code>"2001: A Space Odyssey"</code>.'
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testString: 'assert("2001: A Space Odyssey".match(numRegex).length == 4, ''Your regex should find 4 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 numString = "Your sandwich will be $5.00";
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let numRegex = /change/; // Change this line
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let result = numString.match(numRegex).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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// solution required
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```
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</section>
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