Anybody can tell me the reason that put a line of “let localArray = arr2.slice();” there?
I can’t understand the meaning of arr2.slice() as within the “()” is empty, thanks!
Question:
Slice and Splice
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.
**Your code so far**
function frankenSplice(arr1, arr2, n) {
let localArray = arr2.slice();
for (let i = 0; i < arr1.length; i++) {
localArray.splice(n, 0, arr1[i]);
n++;
}
return localArray;
}
frankenSplice([1, 2, 3], [4, 5, 6], 1);
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Challenge: Slice and Splice
Link to the challenge:
