How do you create a global constructor object in javascript?

[drayarms]

Hello folks,

I think the question is rather self explicit.  I need to create an object from which I can create instances during the life of my application.  So I opted for a constructor object.  I just don't know how to make it global so that all my scripts can have access to it.  I have tried including it in a namespace without succes

var myNamespace = {

     myConstructorObject:function(){

          //Attributes and methods of my constructor go here

     }

}

Also tried this...

var myNamespace = {

     function myConstructorObject(){

          //Attributes and methods of my constructor go here

     }

}

In both cases, I create a new instance of my constructor like so
var newInstance = myNamespace.myConstructorObject

I also tired creating the constructor object as a global object outside of my namespace like so

myConstructorObject = function(){

     //Attributes and methods


}

[kicken]

All you have to do is define a function, then call it with the new operator.

 

function MyObject(param){
   this.blah = param;
}


var obj = new MyObject('hi');

If you want to create a namespace you can, you'd just declare the function as a property of that object:

var myNamespace = {
    MyObject: function(param){
        this.blah = param;
    }
};

var obj = new myNamespace.MyObject();

[Irate]

Custom Constructors can be created with functions as mentioned above (actually, functions returning this or a property of this can also be used neatly for imitating classes as you know them in Java).

 

For example, assuming that I want to create a global constructor "TypedArray", I'd write something like this...

 

window.TypedArray = function(typeToUse /*, args (as array or array elts) */) {this.type = typeToUse;this.new_array = [];if(arguments.length > 1) {for(var i = 0; i < arguments.length; i++) {if("array" !== typeof arguments[i]) {if(this.type !== typeof arguments[i]) continue;this.new_array[this.new_array.length] = arguments[i];} else {for(var n = 0; n < arguments[i].length; n++) {if(this.type !== typeof arguments[i][n]) continue;this.new_array[this.new_array.length] = arguments[i][n];}}}}return this;};

var x = new TypedArray("string"); // define a new typed array
var a = x.new_array; // a is now the array
var t = x.type; // t now holds the value of type

Hope that helped you a little bit.

 

Edit: Fixed code formatting... made a mistake with closing a comment...

code=auto:0 also messed up spacing... Oh, whatever.

Edited August 10, 2013 by Irate