FCC - Mutations

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".

by Tom M

HTML

<div id="rightHere">

</div>

JavaScript

function mutation(arr) {
	var x = arr[0].toLowerCase();
  var y = arr[1].toLowerCase().split("");
  
for (var i=0; i < y.length; i++) {
	if (x.indexOf(y[i]) === -1) {
  return false;
  }
} return true;


} 

document.getElementById("rightHere").innerHTML = mutation(["hello", "hol"]);