On Aug 20, 2009, at 4:33 PM, Jordan Osete wrote:
Hello everybody.
The currently proposed bind() method for function objects behaves
like call(): it takes a number of arguments (from arguments[1]
onwards), and uses them for the function execution.
Wouldn't it be more flexible to behave like apply(), taking an array
of parameters instead of taking each parameter individually ?
The second approach seems more powerful to me. That is, every call()
can easyly be replaced by apply():
func.call( thisObj, a, b, c ) -> func.apply( thisObj, [ a, b, c ] )
...But when you only have got an array of arguments, you can't go
the other way around:
func.apply( thisObj, argsArray ) -> func.call( /* impossible */ )
Would it be possible to change bind to behave like apply ?
If `boundArgs` is an array of arguments to bind, then I think you
should be able to do this via something like:
Function.prototype.bind.apply(targetFn, [thisArg].concat(boundArgs));
// or maybe:
boundArgs.unshift(thisArg);
Function.prototype.bind.apply(targetFn, boundArgs);
Which is not very elegant of course (first version also takes a
performance hit by creating unnecessary Array object).
--
kangax
_______________________________________________
es-discuss mailing list
[email protected]
https://mail.mozilla.org/listinfo/es-discuss
