Javascript objects

javascript is an object-oriented programming language.

Javascript object is a collection of properties each property is key -> value pair.

ways of creating an object

object literal notation

is a list of name : values inside curly braces

var obj = {
    name: "sammy",
    age: 14,
    isMale: true
};

new Object()

var obj = new Object();
obj.name = "sammy"
obj.age = 15;
obj.isMale = true;

constructor function

function Person(name, age, isStudent) {
    this.name = name;
    this.age = age;
    this.isStudent = isStudent;
};
var student = Person("sammy", 32, true);

object properties

values associated with an object. They can be accessed using the dot notation or bracket notation

console.log(Person.name) // dot notation
console.log(Person["age"]) // bracket notation

object methods

These are functions that are properties of an object. they allow an object to perform actions.

var person = {
    name: "sammy"
    age: 33
    greet: function Developer() {
                return "Hello my name is " + this.name;
}};
console.log(person.greet()); // calling an object method

Object Accessors

allows us to define custom behavior of getting and setting values of a property.

let car= {
    model: "subaru",
    color: "orange",
    fuel_type: "diesel",
    get fuel() {
         return this.fuel_type
    }
}

console.log(car.fuel)

setter methods

let car = {
    model: "subaru",
    color: "orange",
    fuel_type: "",
    set fuel(fuel) {
        this.fuel_type = fuel
    }
};
car.fuel = "petrol"
console.log(car.fuel_type)