freeCodeCamp Challenge Guide: Slice and Splice

[marc-gs]

freeCodeCamp Challenge Guide: Slice and Splice

Slice and Splice Problem Explanation We need to copy each element from the first array into the second array starting at the index n. We’ve also got to ensure that the original arrays are not mutated. That is, we cannot make any changes to the original arrays. Relevant Links Array.slice() Array.splice() Hints Hint 1 Create a copy of the second array inside of the function. This will ensure that the original array is not mutated. This can be done by using the slice operation on the sec…

Since we can’t add our own solutions directly under the threads anymore and instead have to create a topic in this section to have it added, this was my personal solution to the challenge:

function frankenSplice(arr1, arr2, n) {
  let newArr2 = [...arr2];
  for (let i = 0; i < arr1.length; i++) {
    newArr2.splice(n + i, 0, arr1[i]);
  }
  return newArr2;
}

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

Essentially just splicing each arr1 element at index N + loop iteration # to correctly position each new element to avoid backwards order. Passed all checks.

[camperextraordinaire]

This solution is pretty similar to Solution #1, so we probably will not add it.

[marc-gs]

Out of curiosity do either n++ or n + i have any advantages over the other other than saving a line?