ee1e8abd87
* feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
71 lines
1.7 KiB
Markdown
71 lines
1.7 KiB
Markdown
---
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id: 587d7db5367417b2b2512b96
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title: Match Letters of the Alphabet
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challengeType: 1
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forumTopicId: 301354
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dashedName: match-letters-of-the-alphabet
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---
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# --description--
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You saw how you can use <dfn>character sets</dfn> to specify a group of characters to match, but that's a lot of typing when you need to match a large range of characters (for example, every letter in the alphabet). Fortunately, there is a built-in feature that makes this short and simple.
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Inside a character set, you can define a range of characters to match using a hyphen character: `-`.
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For example, to match lowercase letters `a` through `e` you would use `[a-e]`.
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```js
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let catStr = "cat";
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let batStr = "bat";
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let matStr = "mat";
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let bgRegex = /[a-e]at/;
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catStr.match(bgRegex); // Returns ["cat"]
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batStr.match(bgRegex); // Returns ["bat"]
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matStr.match(bgRegex); // Returns null
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```
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# --instructions--
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Match all the letters in the string `quoteSample`.
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**Note**
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Be sure to match both upper- and lowercase **letters**.\*\*\*\*
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# --hints--
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Your regex `alphabetRegex` should match 35 items.
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```js
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assert(result.length == 35);
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```
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Your regex `alphabetRegex` should use the global flag.
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```js
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assert(alphabetRegex.flags.match(/g/).length == 1);
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```
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Your regex `alphabetRegex` should use the case insensitive flag.
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```js
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assert(alphabetRegex.flags.match(/i/).length == 1);
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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 quoteSample = "The quick brown fox jumps over the lazy dog.";
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let alphabetRegex = /change/; // Change this line
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let result = alphabetRegex; // Change this line
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```
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# --solutions--
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```js
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let quoteSample = "The quick brown fox jumps over the lazy dog.";
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let alphabetRegex = /[a-z]/gi; // Change this line
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let result = quoteSample.match(alphabetRegex); // Change this line
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```
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