Algorithms in Javascript: CTCI 1.4 Palindrome Permutation: Given a string, determine if it is a permutation of a palindrome.

ctci-1.4-is-string-a-permutation.js

const isPermutation = (s1, s2) => {
  if(s1.length != s2.length) return false;
  return s1.split('').sort().join('') === s2.split('').sort().join('');
}

let a = isPermutation("paypalishiring", "palpayhiringis"); // true
let b = isPermutation("paypalishiring", "hiringpalsipay"); // true
let c = isPermutation("paypalishiring", "palpayhirising"); // true
let d = isPermutation("paypalishiring", "palpayhiringgg"); // false
console.log(a + ', ' + b + ', ' + c + ', ' + d);