Meal Maker porperty 'push' undefined

I am always getting the following error message:

** this._courses[courseName].push(dish);**

TypeError: Cannot read property ‘push’ of undefined
at Object.addDishToCourse (/home/ccuser/workspace/learn-javascript-objects-meal-maker/app.js:39:29)
at Object. (/home/ccuser/workspace/learn-javascript-objects-meal-maker/app.js:56:6)
at Module._compile (module.js:571:32)
at Object.Module._extensions…js (module.js:580:10)
at Module.load (module.js:488:32)
at tryModuleLoad (module.js:447:12)
at Function.Module._load (module.js:439:3)
at Module.runMain (module.js:605:10)
at run (bootstrap_node.js:427:7)
at startup (bootstrap_node.js:151:9)

I read a previous topic about the same problem and I went through my code and corrected everything based on that, but I still get the error message above.

Can you help me what the probelem could be, please?

Thank you in advance!

const menu = {
  _courses: {
   _appetizers: [],
   _mains: [],
   _desserts: [],
  set appetizers(chooseAppetizer) {
  set mains(chooseMain) {
  set desserts(chooseDessert) {
  get appetizers() {
    return this._appetizers;
  get mains() {
    return this.mains;
  get desserts() {
    return this.desserts;
  get courses() {
    return { 
    appetizers: this._courses.appetizers,
    mains: this._courses.mains,
    desserts: this._courses.desserts}
  addDishToCourse (courseName, dishName, dishPrice) {
    const dish = {
     name: dishName,
     price: dishPrice,
 getRandomDishFromCourse (courseName) {
   const dishes = this._courses[courseName];
   const randomIndex = Math.floor(Math.random()*dishes.length);
   return dishes[randomIndex];
 generateRandomMeal() {
   const appetizer = this.getRandomDishFromCourse('appetizers')
   const main = this.getRandomDishFromCourse('mains')
   const dessert = this.getRandomDishFromCourse('desserts')
   const totalPrice = appetizer.price + main.price + dessert.price
   return `Your meal is ${}, ${} and ${dessert.main}. The price is $${totalPrice} total.`


menu.addDishToCourse('appetizers', 'A', 4.25);
menu.addDishToCourse('appetizers', 'B', 2.50);
menu.addDishToCourse('appetizers', 'C', 3.00);

menu.addDishToCourse('mains', 'E', 5.25);
menu.addDishToCourse('mains', 'F', 5.50);
menu.addDishToCourse('mains', 'G', 6.00);

menu.addDishToCourse('desserts', 'H', 1.25);
menu.addDishToCourse('desserts', 'I', 1.50);
menu.addDishToCourse('desserts', 'J', 2.00);

let meal = menu.generateRandomMeal();


methods belong to/are part of specific data type, like push is specific for arrays. Somehow this._courses[courseName] is undefined, so given its not an array, it will throw an error

maybe use console.log to trace how come this._courses[courseName] is undefined?

the problem is with the getters of appetizers, mains and desserts, this.mains is undefined, given menu doesn’t have mains property, mains is part of courses

Thank you for your help! It’s working now. :slight_smile:

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