Tell us what’s happening:
Describe your issue in detail here.
why do I have to create a new array to splice the arr1 into arr2.
I thought arrays in JS are mutable.
ex. arr2.splice(index, 0, …arr1) returns
Thanks
**Your code so far**
function frankenSplice(arr1, arr2, index) {
let localArr = arr2.slice();
console.log(localArr)
localArr.splice(index, 0, ...arr1);
console.log(localArr)
return localArr
}
console.log(frankenSplice([1, 2, 3], [4, 5, 6], 1));
**Your browser information:**
User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36
Challenge: Slice and Splice
Link to the challenge: