How to use

favoriteDishes

function

in

Array

Favorites.create({forUser: userID}, function (err, favorite) {
  if (err) throw err;
  favorite.favoriteDishes.push(favDishID);
  favorite.save( function (err, favorites) {
    if (err) throw err;
for (var i = 0; i < result[0].favoriteDishes.length; i++) {
  if (result[0].favoriteDishes[i]._id == favDishID)
  duplicate = true;           // ...yes!
  result[0].favoriteDishes.push(favDishID);
  result[0].save( function(err, favorites) {
    if (err) throw err;