Javascript simple palindrome function

Question

 function palindrome(str) { // "Hello there"
   str.toLowerCase(); // "hello there"
   str = str.replace(/\s/g, ""); // "hellothere"
   var a = str;
   a.split("").reverse().join(""); // a = "erehtolleh"
   return (str === a); // "hellothere" === "erehtolleh"
 }

 alert(palindrome("123432"));

I passed non -palindromic value 123432 but it returns true value. Anyone know what's wrong with my palindrome function? Would really appreciate if someone can check my logic on it.

Answer 1

You need to assign value of a as its an return function

function palindrome(str) {                       // "Hello there"
    str.toLowerCase();                               // "hello there"
    str = str.replace(/\s/g, "");                    // "hellothere"
    var a = str;                             
    a = a.split("").reverse().join("");                  // a = "erehtolleh"
    return (str === a);                             // "hellothere" == "erehtolleh"
}


alert(palindrome("malayalam"));