How to insert an item into an array at a specific index (JavaScript)?

Question

I am looking for a JavaScript array insert method, in the style of:

arr.insert(index, item)

Preferably in jQuery, but any JavaScript implem

Answer 1

Another possible solution, with usage of Array#reduce.

const arr = ["apple", "orange", "raspberry"];
const arr2 = [1, 2, 4];

const insert = (arr, item, index) =>
  arr.reduce(function(s, a, i) {
    i === index ? s.push(item, a) : s.push(a);
    return s;
  }, []); 

console.log(insert(arr, "banana", 1));
console.log(insert(arr2, 3, 2))