30-seconds-of-code/snippets/isAnagram.md

isAnagram

Checks if a string is an anagram of another string (case-insensitive, ignores spaces, punctuation and special characters).

Use String.toLowerCase(), String.replace() with an appropriate regular expression to remove unnecessary characters, String.split(''), Array.sort() and Array.join('') on both strings to normalize them, then check if their normalized forms are equal.

const isAnagram = (str1, str2) => {
  const normalize = str =>
    str
      .toLowerCase()
      .replace(/[^a-z0-9]/gi, '')
      .split('')
      .sort()
      .join('');
  return normalize(str1) === normalize(str2);
};

isAnagram('iceman', 'cinema'); // true