Basic Algorithm Scripting - Slice and Splice

JavaScript
1

Tell us what’s happening:
The following code is working, and I understand why.

function frankenSplice(arr1, arr2, n) {
let localArr = […arr2];
localArr.splice(n, 0, …arr1);
return localArr;
}

But why is my other solution not working?

Instead of assinging arr2 to a variable I just chain on the splice method immediatly.

But when I do it like this, I get an empty array…

  **Your code so far**


function frankenSplice(arr1, arr2, n) {
return [...arr2].splice(n, 0, ...arr1);
}

frankenSplice([1, 2, 3], [4, 5, 6], 1);

  **Your browser information:**

User Agent is: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36.

Challenge: Slice and Splice

Link to the challenge:

2

you can’t assign to return and that will make your code not execute at all

after that, depends on how you fix it, you may have some other issues

3

I’m sorry that was a typo. I know I can’t assign to return. I edited the post.

4

what does splice return? check the documentation if you don’t know

5

Aaah, I get it now. Thank you!

1 Like
6

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