Hi. I'm pretty experienced with Javscript but totally new to JSON and

have a question...



Is it possible to use JSON to "populate" objects that are already

defined? For instance, I have two "classes":



function class1() {

  this.class2_array;

}



function class2() {

  this.prop1;

  this.prop2;

  this.prop3;

  this.prop4;

}



I want to create a bunch of class2 objects in the class1.class2_array

property.



The existing classes already have their own methods, etc so it's not

just about storing data. Previously I created log signatures for class2

and basically created the objects the "old fashioned" way.



Can I do this?

There are a number of approaches. An elegant one is to pass an

initialization object to the constructor.



     function class2(init) {

         this.prop1 = init.prop1  || default_prop1;

         ...

     }



The constructor can do checking on the initial values, filling in

defaults.



With a constructor in this style, you simply pass it the object that

JSON produced. You could also wrap it so that it gets delivered to the

right constructor:



foo = {

     "class": "class2",

      "init": {

          "prop1": ...

      }

};



new window[foo["class"]](foo.init);



--- In json@yahoogroups.com, RouteSlip.com <routeslip@...> wrote:

>

> Hi. I'm pretty experienced with Javscript but totally new to JSON and

> have a question...

>

> Is it possible to use JSON to "populate" objects that are already

> defined? For instance, I have two "classes":

>

> function class1() {

>  this.class2_array;

> }

>

> function class2() {

>  this.prop1;

>  this.prop2;

>  this.prop3;

>  this.prop4;

> }

>

> I want to create a bunch of class2 objects in the class1.class2_array

> property.

>

> The existing classes already have their own methods, etc so it's not

> just about storing data. Previously I created log signatures for class2

> and basically created the objects the "old fashioned" way.

>

> Can I do this?

>