FunctionalPalindrome.js

// Bonfire: Check for Palindromes
// Author: @codebubb
// Challenge: http://www.freecodecamp.com/challenges/bonfire-check-for-palindromes?solution=function%20palindrome(str)%20%7B%0A%20%20%2F%2F%20Good%20luck!%0A%20%20str%20%3D%20stripandlower(str)%3B%0A%20%20return%20str%20%3D%3D%20reverse(str)%3B%0A%7D%0A%0Afunction%20reverse(str)%7B%0A%20%20return%20str.split(%27%27).reverse().join(%27%27)%3B%0A%7D%0A%0Afunction%20stripandlower(str)%7B%0A%20%20return%20str.replace(%2F%5B%5EA-Za-z0-9%5D%2Fg%2C%20%27%27).toLowerCase()%3B%0A%7D%0A%0A%0Apalindrome(%22eye%22)%3B%0A
// Learn to Code at Free Code Camp (www.freecodecamp.com)

function palindrome(str) {
  // Good luck!
  str = stripandlower(str);
  return str == reverse(str);
}

function reverse(str){
  return str.split('').reverse().join('');
}

function stripandlower(str){
  return str.replace(/[^A-Za-z0-9]/g, '').toLowerCase();
}


palindrome("eye");