Thank you very much, your argumentation makes perfect sense.
I find this type of discussions highly beneficial to the practice of
this language.
pedro
On Mar 23, 2:17 pm, Luke Smith <lsm...@lucassmith.name> wrote:
> On Mar 23, 2011, at 6:43 AM, Poetro wrote:
>
>
>
>
>
>
>
>
>
> > 2011/3/23 pnbv <p.bacelar.vasconce...@gmail.com>:
> >> Considering a single instance object:
> >> app = {
> >> foo: 'afoo',
> >> bar: 'abar',
>
> >> callbackLib: {
> >> replyFoo: function () {
> >> console.log(this.foo);
> >> },
> >> replyBar: function () {
> >> console.log(app.bar);
> >> }
> >> },
>
> >> doSomeThing: function (){
> >> this.callbackLib.replyFoo.call(this);
> >> this.callbackLib.replyBar();
> >> }
> >> }
>
> >> app.doSomeThing();
>
> >> What would be the preferred way of doing this (if there really is a
> >> need for nested objects:)?
> >> Thanks,
> >> pedro
> > If you just want to get rid of the reference to this, you could do:
>
> > app = {
> > foo: 'afoo',
> > bar: 'abar',
>
> > callbackLib: {
> > replyFoo: function () {
> > console.log(app.foo);
> > },
> > replyBar: function () {
> > console.log(app.bar);
> > }
> > },
>
> > doSomeThing: function (){
> > app.callbackLib.replyFoo();
> > app.callbackLib.replyBar();
> > }
> > }
> > app.doSomeThing();
>
> > Although this would trigger errors in the following case:
>
> > bar = app;
> > app = {};
> > bar.doSomeThing();
>
> > As app is now no more.
>
> There's a failure case either way.
> var doSomething = app.doSomething;
>
> doSomething(); // boom if the 'this' references are left in tact.
>
> I find it preferable for non-instance collections of functions (i.e.
> object literals with methods as shown) to reference the object rather
> than 'this' as they are often utility functions or apply to the
> application as a whole, and are therefore more useful as function refs
> that can be passed around or assigned to shortcut vars. Shortcut vars
> can be compressed better as well.
>
> Short form: use 'this' in prototype methods, the containing var name
> in "static" methods. As with most things, this is a guide, not a rule.
>
> L
>
>
>
>
>
>
>
> > --
> > Poetro
>
> > --
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>
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