Re: Use user_data in callback

[Norman L Smith <nls1729 gmail com>]

Jay,

See https://git.gnome.org/browse/gjs/tree/modules if you have not
done so.  I did not think about the fact that your distro might
not provide the files I referenced.

Sorry about that..
Norman

On Wed, 2015-09-23 at 14:52 +0200, Jay Strict wrote:
> On 23.09.2015 12:45, Norman L Smith wrote:
> > Hello Jay,
> >
> > From /usr/share/gnome-js/signals.js
>
> Where do I find this file "signals.js"? It is not in my file system
> tree.
>
> > function _connect(name, callback) {
> >
> > The connect takes two arguments.
> >
> > The callback argument, without binding additional arguments to 
> > the callback, consists of only the function and its first and 
> > second argument. 
> >
> > lang.bind as noted in the comments below provides for the use
> > of "this" in the body of the callback function and binding
> > additional arguments to the callback function.
> >
> > From /usr/share/gnome-js/lang.js
>
> Again, no file "lang.js", neither in /usr/share/gnome-shell/** nor in
> /usr/** nor in https://github.com/GNOME/gnome-shell.git
>
> > /**
> >  * Binds obj to callback. Makes it possible to refer to "obj"
> >  * using this within the callback.
> >  * @param {object} obj the object to bind
> >  * @param {function} callback callback to bind obj in
> >  * @param arguments additional arguments to the callback
> >  * @returns: a new callback
> >  * @type: function
> >  */
> >
> > You will not see many examples of using the binding of additional 
> > arguments because of "this" being available in the callback
> > function.
>
> Ah ok, I see that you don't need additional arguments when you have
> "this" available.
>
>
> Kind regards,
> Jay