/* Palindrome detection, in Jsish */
function isPalindrome(str:string, exact:boolean=true) {
  if (!exact) {
      str = str.toLowerCase().replace(/[^a-z0-9]/g, '');
  }
  return str === str.split('').reverse().join('');
}

;isPalindrome('BUB');
;isPalindrome('CUB');

/*
=!EXPECTSTART!=
isPalindrome('BUB') ==> true
isPalindrome('CUB') ==> false
=!EXPECTEND!=
*/