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

title, tags, expertise, cover, firstSeen, lastUpdated

title	tags	expertise	cover	firstSeen	lastUpdated
Palindrome	string	intermediate	blog_images/bridge-drop.jpg	2017-12-17T16:41:31+02:00	2020-10-22T20:24:04+03:00

Checks if the given string is a palindrome.

• Normalize the string to String.prototype.toLowerCase() and use String.prototype.replace() to remove non-alphanumeric characters from it.
• Use the spread operator (...) to split the normalized string into individual characters.
• Use Array.prototype.reverse(), Array.prototype.join() and compare the result to the normalized string.

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

palindrome('taco cat'); // true