W1D2 - Debugging Incorrect Code

palindrome.js

function isPalindrome(str) {
  str = str.split(" ").join("").toLowerCase(); 
  var mid = Math.floor(str.length / 2);
  var last = str.length - 1;

  for (var i = 0; i <= mid; i++) {
  	// console.log(">>>>" + str[i] + "  " + str[last - i]);
    if (str[i] !== str[last - i]) {
    	return false;
    } 
  }
  return true;//never found unequal chars
}

// Test driver code. These should all log true.
console.log(isPalindrome('p') === true);
console.log(isPalindrome('foo') === false);
console.log(isPalindrome('racecar') === true);
console.log(isPalindrome('Kayak') === true);
console.log(isPalindrome('a santa at NASA') === true);
console.log(isPalindrome('live without evil') === false);
console.log(isPalindrome('just some random words') === false);