create dynamic Object (as function(...))

Question

I create an object with dynamic properties during runtime in JavaScript.

It simply works like that:

var object = {
    'time' = ""
};

After that, I'm able to add more properties, for instance, like that:

var propName = "value1";
object[propName] = "some content...";

But I need to work with a real object, so that I can create a new instance, e.g.: var myObject = NewObject('myTime', 'myValue1', 'myValue2' ...);

For creating a static custom object I would do this:

function NewObject(time, val1, val2, ... valn) {
    this.time = time;
    this.val1 = val1;
    ...
}

But I have no idea, how to design such a function dynamically, depending on different user input my NewObject could have 1 to n value properties...?

I know, I would be better to implement a List or Array, but I would like to know, if there's a solution for my problem?

Thanks for your help.

can you create an array within your NewObject? For example, this.vals = array(); for(i = 0; i < arguments.length; i++){ this.vals[i] = arguments[i]; } — Zack Newsham
– Zack Newsham, Commented Sep 26, 2013 at 7:14
thanks for your hints. I 'var newInstance = jQuery.extend({}, object);' worked in my case. But I will try @Passerby 's solution, because the jQuery.extend function might not work in every browser... — wassermine
– wassermine, Commented Sep 26, 2013 at 7:45

Passerby · Accepted Answer · 2013-09-26 07:37:24Z

1

You can use the arguments object inside function:

function NewObject(time){
    this.time=time;
    if(arguments.length>1){
        for(var i=1;i<arguments.length;i++){
            this["val"+i]=arguments[i];
        }
    }
}

JSFiddle

answered Sep 26, 2013 at 7:37

Passerby

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