code-examples/palindrome.js at master · mehdisyed3/code-examples · GitHub

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/*
Return true if the given string is a palindrome. Otherwise, return false.

palindrome("eye");                              // true
palindrome("_eye")                              // true.
palindrome("race car")                          // true.
palindrome("not a palindrome")                  // false.
palindrome("A man, a plan, a canal. Panama")    // true.
palindrome("never odd or even")                 // true.
palindrome("nope")                              // false.
palindrome("almostomla")                        // false.
palindrome("My age is 0, 0 si ega ym.")         // true.
*/

function palindrome(str) {

  //comparing original string with reversed string
  if (str.replace(/[\W_]/g, '').toLowerCase() ===
    str.replace(/[\W_]/g, '').toLowerCase().split('').reverse().join("")) {
    return true;
  }
  return false;
}