Slice and Splice: what is the difference between two solutions with the same output?

Programming JavaScript
1

Tell us what’s happening:

The first one passed the test but the second one not at all.

Your code so far


function frankenSplice(arr1, arr2, n) {
  
let myArray = arr2.slice(0);
myArray.splice(n, 0, ...arr1);


  return myArray;
}

console.log(frankenSplice([1, 2, 3], [4, 5], 1)); //-->4, 1, 2, 3, 5

function frankenSplice(arr1, arr2, n) {
  let array2Copy = arr2.slice(0);  
  for (let i = 0; i < arr1.length; i++){
    array2Copy.splice(n, 0, arr1[i]);
  }

  return array2Copy;
}

console.log(frankenSplice([1, 2, 3], [4, 5], 1)); //-->4,3,2,1,5

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36 OPR/63.0.3368.94.

Link to the challenge:

2

It’s splicing in the first array backwards. The other solution has the same comment next to it, but it actually returns 4,1,2,3,5.

3

Oh. My mistake (The devil is in the details)
Thank you