/**
 * Created by Ashish Patel
 * Copyright © 2017 ashish.me
 * ashishsushilpatel@gmail.com 
 */

/**
 * Program:
 * Return true if the string in the first element of the array contains all of the letters of the string in the second element of the array.
 * For example, ["hello", "Hello"], should return true because all of the letters in the second string are present in the first, ignoring case.
 * The arguments ["hello", "hey"] should return false because the string "hello" does not contain a "y".
 * Lastly, ["Alien", "line"], should return true because all of the letters in "line" are present in "Alien".
 */

function mutation(arr) {
  return !(arr[1].toLowerCase().split('').filter((item) => {
    return arr[0].toLowerCase().indexOf(item) === -1;
  }).length > 0);
}

console.log(mutation(["floor", "for"]));