What's wrong the code?

JavaScript
1

Tell us what’s happening:

Your code so far

function mutation(arr) {
  var farr = arr[0].toLowerCase();
  var narr = arr[1].toLowerCase();  
  for (var i=0; i<narr.length; i++) {
    if (farr.indexOf(narr[i]) !== -1) {
      return true;
    }
    return false;
  }
}

mutation(["hello", "hey"]);

Your browser information:

Your Browser User Agent is: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36.

Link to the challenge:

3 
function mutation(arr) {
  var farr = arr[0].toLowerCase();
  var narr = arr[1].toLowerCase();
  
  for (var i=0; i<narr.length; i++) {
    if (farr.indexOf(narr[i]) === -1) {
      return false;
    }
    return true;
  } 
}

mutation(["hello", "hey"]);

but this code cannot work too.~~

4

OH~ i see~~i find out my mistake. Thanks you~

6

I See~~ Thanks very much~~