Hi Dustin,
Well it does, apparently it was called the "splat" operator, which (to
me) sounds a better than "spread". I think it works like:-
var args = [12, true];
new C(...args);
function C( count, isSemiAnnual) {
}
- Maybe one of guys writing the specs can comment on that.
It can be hacked in ES3:-
/**
* @param {Function} fun constructor to be invoked.
* @param {Array} args arguments to pass to the constructor.
* Instantiates a constructor and uses apply().
*/
newApply : function(fun, args) {
if(arguments.length === 0) return;
var f = arguments.callee, i;
f.prototype = fun.prototype;// Copy prototype.
f.prototype.constructor = fun;
i = new f;
fun.apply(i, args); // Apply the original constructor.
return i;
},
- from http://dhtmlkitchen.com/ape/build/APE.js
Garrett
On Thu, Mar 13, 2008 at 10:48 AM, Dominic Cooney
<[EMAIL PROTECTED]> wrote:
> Why doesn't Function have something like apply that does the same as
> in a new expression, i.e. allocate-init-and-apply? To put it another
> way: given arguments in an array, I want to write:
>
> F.thisThing(args) and have it mean the same as new F(args[0], args[1],
> ... args[n-1])
>
> Or is what happens behind the veil of object creation detailed enough
> that I can write a facsimile of it with apply? I guess something like:
>
> var x = {};
> x.prototype = F.prototype;
> x = F.apply(x, args) || x;
>
> But why force me to guess? No doubt I am wrong.
>
> Dominic
>
>
>
> On Mon, Mar 10, 2008 at 7:38 PM, Jon Zeppieri <[EMAIL PROTECTED]> wrote:
> > On 3/10/08, Lars Hansen <[EMAIL PROTECTED]> wrote:
> > > First draft of the spec for the Function class. Please comment.
> > >
> >
> > Suggestion: deprecate the Function constructor and static invoke().
> >
> > Almost all of its uses are better handled by function expressions and,
> > in those cases where eval() in required, one can use eval().
> >
> > -Jon
> >
> >
> > _______________________________________________
> > Es4-discuss mailing list
> > [email protected]
> > https://mail.mozilla.org/listinfo/es4-discuss
> >
> _______________________________________________
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> https://mail.mozilla.org/listinfo/es4-discuss
>
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