gistfile1.txt

const generatePreparedItem = (oldItems, items) => {
  //Search with EAN of item
  //var newItems;

  for (let i = 0; i < items.length; i++) {
    let j = 0;
    for (j = 0; j < oldItems.length; j++) {
      if (items[i].EAN == oldItems[j].EAN) {
        //If you find the same EAN item, it will be replaced.
        let newOrder = oldItems.filter(item=> item !== oldItems[j])
        oldItems = [...newOrder,items[i]]
        //console.log(final)
        //oldItems[j] = items[i];
        break;
      }
    }
    if (j == oldItems.length) {
      //Not found with same EAN item, it will be pushed.
      oldItems = [...oldItems, items[i]];
    }
  }

  return oldItems;
};