a more complete implementation...
Object.prototype.define = function(args, value) {
if (typeof(args) != "string") { throw "Expected a String"; }
args = args.split(".");
var i = null,
l = args.length,
p = this;
for (i = 0; i < l; i++) {
(p[args[i]] === undefined) ? p[args[i]] = ((i+1 < l) ? {} :
value) :
void(0);
p = p[args[i]];
}
return this;
};
you'd use it like this..
var a = {};
a.define('b.c.d.e.f', 123);
On Feb 16, 9:56 am, Jason Mulligan <[email protected]>
wrote:
> Actually, here ...
>
> Object.prototype.define = function(args) {
> if (typeof(args) != "object") { throw "Expected an Object"; }
> for (var i in args) { this[i] = args[i]; }
> return this;
>
> };
>
> On Feb 16, 9:39 am, Jason Mulligan <[email protected]>
> wrote:
>
>
>
>
>
>
>
> > that's not really valid, undefined is as valuable as null when
> > checking an object; just write a handler and drop it onto the array
> > prototype.
>
> > On Feb 16, 7:08 am, Jason Persampieri <[email protected]> wrote:
>
> > > (It's 4am for me, I'm sick, and meds have been taken... so this may be
> > > incredibly dumb)
>
> > > An earlier thread got me thinking. Currently when checking a value nested
> > > several layers deep within an object, you have to do something along the
> > > lines of:
>
> > > d = {};
> > > [stuff]
> > > if ( d && d.foo && d.foo.bar && d.foo.bar.bam ) {
> > > [stuff]
>
> > > }
>
> > > And setting it is even more verbose:
> > > d = {};
> > > d.foo = d.foo || {};
> > > ... you get the point.
>
> > > What would happen if "undefined" were smarter, kinda like an empty ref in
> > > Perl (did I really just say that? ugh.). Why can't we do:
>
> > > d = {};
> > > [stuff]
> > > if ( d.foo.bar.bam ) {
> > > [stuff]
>
> > > }
>
> > > and
>
> > > d = {};
> > > d.foo.bar.bam = "Hi Mentors!"; // { foo: { bar: { bam: "Hi Mentors!" } }
> > > }
>
> > > What's the harm in having the compiler do that bit of optimization for us?
> > > What code would it break? Is there any code that it would make less
> > > maintainable? Do custom getters/setters break this?
>
> > > _jason
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