OOP Question...advanced ish

[Scriptage]

hey,
I'm writing some oo code and am wondering if there is a way to get an objects variable name, ie,

function someobj(id){
this.id=id;
this.displayId = displayId;
return this;
}

function displayId(){
with(this);
<---- I would like to be able to get the variable that the object is stored in (ie objX)---->
}

var objX = new someobj('0909');

Thanks in advance
Carl

[Falconix]

You could always just make a member of the class that holds the object's name, and have it set during the constructor, as a second arguement.

[Scriptage]

I thought as much,
Thanks for your time
Regards
Carl

[Scriptage]

Just came up with this code...it's sloppy but does the job.
Not sure about cross browser compatibility, but this seems to work well in IE. It is dynamic...just uses an eval to create a new object and sets varname as the variable name holder.
Could you please check it for cross browser compatibilty Dave?
This could be useful.

function display(){
with(this);
document.write("<b>Variable: </b><i>"+this.varname+"</i><br /><b>First name:</b><i>" + this.firstname + "</i><br><b>Last name:</b><i>" + this.lastname + "</i>");
}
function func1(firstname, lastname){
this.firstname = firstname;
this.lastname = lastname;
this.display = display;
return this;
}

function obj(varname, the_object,args){
eval(varname + " = new " + the_object +"(" +args +")");
eval(varname+".varname = ' "+varname+" ' ");
return this;
}
obj('person2',func1,"'Carl','Bates'");

person2.display();

[Vladdy]

Why an object needs to know the name of it's instance when all the information stored in it is available through this :rolleyes: :confused: :D

[Scriptage]

say I have a function defined as this.display = display;

function somefunc(){
with(this);
document.write("<a href='#' onClick='"this.display"'>clicky</a>");
}

the above doesn't work!!!!!!

where as:

function somefunc(){
with(this);
document.write("<a href='#' onClick='"+this.varname+".display();'>clicky</a>");
}

would work!

That's why

Regards

[Vladdy]

If your object is associated with a HTML node (expanding it's functionality), you create the instance of the object within such node:

with(document.createElement('a'))
{ myExtension = new myExtensionObject();
onclick = function () { this.myExtension.processOnClick(); return false;};
}