29 lines
863 B
Markdown
29 lines
863 B
Markdown
---
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title: isAnagram
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tags: string,regexp,intermediate
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firstSeen: 2018-02-19T15:47:47+02:00
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lastUpdated: 2020-10-20T23:02:01+03:00
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---
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Checks if a string is an anagram of another string (case-insensitive, ignores spaces, punctuation and special characters).
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- Use `String.prototype.toLowerCase()` and `String.prototype.replace()` with an appropriate regular expression to remove unnecessary characters.
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- Use `String.prototype.split('')`, `Array.prototype.sort()` and `Array.prototype.join('')` on both strings to normalize them, then check if their normalized forms are equal.
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```js
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const isAnagram = (str1, str2) => {
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const normalize = str =>
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str
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.toLowerCase()
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.replace(/[^a-z0-9]/gi, '')
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.split('')
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.sort()
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.join('');
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return normalize(str1) === normalize(str2);
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};
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```
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```js
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isAnagram('iceman', 'cinema'); // true
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```
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