Basic Algorithm Scripting: Slice and Splice

Cing Sian Dal

Aug 12, 2020·1 min read

You are given two arrays and an index.

Copy each element of the first array into the second array, in order.

Begin inserting elements at index n of the second array.

Return the resulting array. The input arrays should remain the same after the function runs.

function frankenSplice(arr1, arr2, n) {
   let arr = arr2.slice();
   arr.splice(n,0,...arr1);
   return arr;
}
frankenSplice([1, 2, 3], [4, 5, 6], 1);