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javascript/snippets/is-anagram.md

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+---
+title: String is anagram
+type: snippet
+tags: [string,regexp]
+cover: new-york
+dateModified: 2020-10-20T23:02:01+03:00
+---
+
+Checks if a string is an anagram of another string (case-insensitive, ignores spaces, punctuation and special characters).
+
+- Use `String.prototype.toLowerCase()` and `String.prototype.replace()` with an appropriate regular expression to remove unnecessary characters.
+- 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.
+
+```js
+const isAnagram = (str1, str2) => {
+  const normalize = str =>
+    str
+      .toLowerCase()
+      .replace(/[^a-z0-9]/gi, '')
+      .split('')
+      .sort()
+      .join('');
+  return normalize(str1) === normalize(str2);
+};
+```
+
+```js
+isAnagram('iceman', 'cinema'); // true
+```