Palindrome

is-palindrome.js

function isPalindrome(str) {
  str = str.toLowerCase().replace(/\s/g, '');
  return str === str.split('').reverse().join('');
}

function isPalindromeWithoutReverse(str) {
  str = str.toLowerCase().replace(/\s/g, '');
  
  let result = true;
  let l = 0;
  let r = str.length - 1;
  
  while (l <= r) {
    if (str[l] !== str[r]) {
      result = false;
      break;
    } else {
      l++;
      r--;
    }
  }
  
  return result;
}

console.log(isPalindrome('Race Car'));
console.log(isPalindrome('Baab'));

console.log(isPalindromeWithoutReverse('Race Car'));
console.log(isPalindromeWithoutReverse('Baab'));