String is anagram

OSCC · JavaScript, String, Regexp · Oct 20, 2020

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.
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

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