ccerrato147

// The nested array
const nested =  [[1,2,[3,[8,10]]],4];
// An array that will contain the flatten array
const flat = [];
// The function that runs through the array and flattens it
const scan = (el, arr) =>{
  if(!Array.isArray(el))
    throw "The first parameter should be an array";
  if(!Array.isArray(arr))
    throw "The second parameter should be an array";