Subj : Re: about defining object...
To   : Youngsun Jeong <celleris@naver.com>
From : Brendan Eich <brendan@meer.net>
Date : Wed Oct 01 2003 11:54 pm

Youngsun Jeong wrote:

>I modified that : 
>           }
>           else
>           {
>              if(!JS_IsConstructing(cx))
>              {
>                  if(!js_ValueToObject(cx, argv[0], &obj))
>                      return JS_FALSE;
>              }
>           }
>
>  
>

So you left the if(argc == 0) obj = NULL; part at the beginning of the 
constructor?  Why?

> obj = js_NewObject(cx, &my_class, NULL, NULL);
>  
> if (!obj)
>      return JS_FALSE;
> JS_SetPrivate(cx, obj, argv[0]); Is that right?
>  
>

It depends on the type of argv[0].  What type do you want the age slot 
to have?

>And I tested my code. See below ;
> testscript : 
>    function sumage(age)
>    {
>        var myage = age.plusAge(10); //myage = age + 10
>        return myage;
>    }
> "age" value is integer.
>But, it's not working. I got the error message "TypeError: age.plusAge
>is not a function".
>
>What is wrong? How "age" value is passed to function "plusAge()"
>*without* constructing myobject(that is "var myobj = new myobject();")
>*on the script*?
>  
>

How are you calling sumage?  Please show complete examples.  If you 
didn't pass a new myobject instance as the age parameter to sumage, then 
of course you'll get an error.

/be

.