Javascript Beginner's series - Objects

creation_and_handling_of_objects.js

var flight = {
    airline: "Oceanic",
    number: 815,
    //you can have nested objects
    departure: {
        IATA: "SYD",
        time: "2004-09-22 14:55",
        city: "Sydney"
    },
    arrival: {
        IATA: "LAX",
        time: "2004-09-23 10:42",
        city: "Los Angeles"
    }
};

var name;
console.log("Here are the properties of my brand new object:");
for(name in flight){
    console.log(name);
}

handling_properties.js

//------------------- How to retrieve object properties -----------------------------
console.log(flight.airline); //"Oceanic"
console.log(flight["airline"]); //"Oceanic"
console.log(flight.departure.IATA); //"SYD"
console.log(flight["departure"]["IATA"]); //"SYD"

//------------------- How to provide default values ---------------------------------
var status = flight.status || "unknown";

//------------------ How to guard against "undefined" throwing TypeError ------------
flight.equipment && flight.equipment.model

//----------------- How to update an object -----------------------------------------
flight.ariline = "Spirit Airlines";
console.log(flight.airline);

//if property does not exist, it will be added, this is called object augmentation
flight.equipment = {
    model: 'Boeing 777'
};
flight.status = 'overdue';
console.log("Here is my updated flight: " + flight);