JavaScript get value from nested object

Question

If this is my object:

var obj = {
bakery1: {
    small: {
        name: "Small cookie",
        price: 0.75;
    }
    large: {
        name: "Large cookie",
        price: 3.00;
    }
}
bakery2: {
    small: {
        name: "Small cookie",
        price: 1.00;
    }
    large: {
        name: "Large cookie",
        price: 4.00;
    }
}
};

How would I go about making a loop that prints every price to the console?

And when this value is printed, is there a way to trace the name?

For example if the output is 3.00 how would I make a function that gives me the name that goes with the 3.00 price?

Thanks in advance!

Answer 1

To answer your question:

function printPrice(obj) {
  if (obj.price)
    console.log(obj.name, obj.price)

  else for (key in obj)
    printPrice(obj[key])
}

var obj = {
  "bakery1": {
    "small": {
      "name": "Small cookie",
      "price": 0.75
    },
    "large": {
      "name": "Large cookie",
      "price": 3
    }
  },
  "bakery2": {
    "small": {
      "name": "Small cookie",
      "price": 1
    },
    "large": {
      "name": "Large cookie",
      "price": 4
    }
  }
};

printPrice(obj)

However, for these kinds of collections, it might be better to use an array. For example, we could do something like this:

var bakeries = [
  {
    name: 'Bakery 1',
    menu: [
      {name: 'small cookie', price: 0.75},
      {name: 'large cookie', price: 3.00}
    ]
  },

  {
    name: 'Bakery 2',
    menu: [
      {name: 'small cookie', price: 1.00},
      {name: 'large cookie', price: 4.00}
    ]
  }
]

This enables us to better organize the specific properties of each item. In this case, the code to print the prices becomes much simpler:

bakeries
  .map(bakery => bakery.menu)
  .forEach(menu => menu.map(
    item => console.log(item.name, item.price)))