objects.js

let x = { };

let sandwich = {
    slices_of_bread: 2,
    ham: true,
    veggies: ['lettuce', 'tomato', 'onion']
};
console.log(sandwich);
// logging the entire sandwich and all its properties
console.log(sandwich.slices_of_bread);
// examining the 'slices_of_bread' property
console.log(sandwich.veggies[0]);
// logging the first element of the array stored within the veggies property

let sandwiches = [
    {
        id: 1,
        bread_type: 'Sourdough',
        ingredients: 'Spicy Turkey, Spicy Mustard'
    },
    {
        id: 2,
        bread_type: 'Marbled Rye',
        ingredients: 'Prosciutto, Swiss Cheese'
    },
    {
        id: 3,
        bread_type: 'Wheat',
        ingredients: 'Ham, Provolone Cheese, Tomato'
    }
];


// here is an object literal with four key-value pairs
let sandwich = {
    cheese: 'Smoked Gouda',
    meat: 'Dry-aged Bison',
    sauce: 'Chipotle Aioli',
    veggies: 'Caramelized Onions'
}
// the variable 'topping' is used instead of an index
for(let topping in sandwich){
    // when we log 'topping', we notice it's a key
    console.log(topping);
    // when we pass the key to the 'sandwich' object, we can pull values
    console.log(sandwich[topping]);
}