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2 ways to create an object in JavaScript
It's important to note that there are no classes(except in ES6) in JavaScript. Functions can be used to somewhat simulate classes, but in general JavaScript is a class-less language. Everything is an object. And when it comes to inheritance, objects inherit from objects, not classes from classes as in the classical languages.
Using Functions
Using Object literals
Using Functions
The most common way to create an object.First of we define a function to create an object of the class ( function ) by using new keyword.
If you want to add a behavior to your object, you can go for constructor and add methods to the object during construction or give your class a prototype.
If you don't have behavior associated with an object (i.e. if the object is just a container for data/state), I would use an object literal.
function myClass(foo,bar) {
this.foo = foo;
this.bar = bar;
// or:
myClass.prototype.verify = function () {
return this.foo === this.bar;
};
//creating object
var newInstance = new myClass(42,43);
// calling member function
newInstance. verify();
Using Object literals
If you don't need anything beyond a simple container of data, go with a simple literal.No behaviour associated with the object, we can go for object literals.The object created using Object literals are Singleton.
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A container which lets developers bundle all functionality under a unique, application-specific name.
Creating a namespace in JavaScript is simple, create one global object, and all variables, methods, and functions become properties of that object.
Use of namespaces also reduces the chance of name conflicts in an application,since each application's objects are properties of an application-defined global object.
// global namespace
var MYAPP = MYAPP || {};
//creating Sub namespace
MYAPP.event = {};
Naming namespace,you'll capitalize the first letter. If your app requires use of global scope, it's good practice to use a namespace like this to prevent name conflicts (just as jQuery uses $ as a namespace in order to access all the methods and properties of its API).
var myApplication = {
getInfo:function(){
/* function definition */
},
models : {
},
views : {
pages : {}
},
collections : {
}
};
For get to know more about Namespace patterns click here
Whether or not a language is dynamic typically refers to the type of binding the compiler does: static or late binding.
Static binding simply means that the method is bound at compile time.
Dynamic languages are the opposite. They do their work at runtime. They do little or no checking for the existence of methods at compile time but instead do it all at runtime.
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Remember, before you can be great, you’ve got to be good. Before you can be good,you’ve got to be bad. But before you can even be bad, you’ve got to try.
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