Basic Algorithm Scripting: Slice and Splice: question with unknown behaviour

JavaScript
1

I understand why my code is wrong: since I don´t use n++, the splice will always begin at the same location. What I don´t understand is why my code:

function frankenSplice(arr1, arr2, n) {
  let arr3 = arr2.slice();
  console.log(arr3)
  

    for (let i = 0; i < arr1.length; i++) {
    arr3.splice(n, 0, arr1[i]);

  }
  return arr3;
  console.log(arr3)
}
frankenSplice([1, 2, 3], [4, 5, 6], 1);

returns this:

4,3,2,1,5,6

Why does it go through arr1 backwards?

2

Nevermind, did a console.log and figured it out.

3

Glad you managed to sort things out. Consider either closing this topic or posting the solution to your problem so that others can benefit from it.