Not understanding mutations

JavaScript
1

Tell us what’s happening:
Hello ! I can’t figure out why my code is returning true instead of false. Somebody can explain me what’s wrong with my ‘solution’ please.

   **Your code so far**


function mutation(arr) {
let test1 = arr[1].toLowerCase;
let test2 = arr[0].toLowerCase;
for (let i = 0; i < test1.length; i++) {
 if(test2.indexOf(test1[i]) < 0) return false;
}
return true;
}

console.log(mutation(["hello", "hey"]));

   **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36.

Challenge: Mutations

Link to the challenge:

2

Take a closer look at lines where are defined test1 and test2. You may also try to print those values to console.

1 Like
3

Thanks ! you’re right, I forgot this => ()

4

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