Reduce algo

reduce.js

function reduce(arr, fn, initial) {
	let result;
  function recursive(i = 0, acc = initial) {
    if (i < arr.length) {
          result = fn(acc, arr[i], i)
      recursive(i + 1, result)
    }
    return result
  }
  recursive();
	return result;
}

var test = reduce([1,2,3], (acc, item, i) => {
  console.log(acc)
  return([...acc, item])
}, [])