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

palindrome

Returns true if the given string is a palindrome, false otherwise.

Convert string toLowerCase() and use replace() to remove non-alphanumeric characters from it. Then, split('') into individual characters, reverse(), join('') and compare to the original, unreversed string, after converting it tolowerCase().

const palindrome = str => {
  const s = str.toLowerCase().replace(/[\W_]/g, '');
  return (
    s ===
    s
      .split('')
      .reverse()
      .join('')
  );
};

palindrome('taco cat'); // true