I'm having trouble with Mutations

JavaScript
1

Tell us what’s happening:
I’m getting the length of them and using them for the if statement.
It’s not making them lowercase, why?

   **Your code so far**


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

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

   **Your browser information:**

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.3 Safari/605.1.15.

Challenge: Mutations

Link to the challenge:

2

String.prototype.toLowerCase() Return value: A new string representing the calling string converted to lower case. mdn

It’s not changing array values

1 Like
3 
function mutation(arr) {
 var c = arr[0];
 var d = arr[1];
 c.toLowerCase();
 d.toLowerCase();
 
 var x = 0;
 var y = 0;
 x = c.length - 1;
 y = d.length - 1;
 console.log(c[x])
 console.log(d[y])
if (c[0] == d[0] && c[x] == d[y]) {
  return true;
}
return false;
}

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

Why did this code not work? I made it to a string now.

Just realised that (the first string needs to have all the values that the second has).

4

this is not changing the strings

you are just checking first and last letter, you need to check them all

2 Likes
5

I misunderstood the challenge. Thanks for help.

7

This topic was automatically closed 182 days after the last reply. New replies are no longer allowed.