On Jul 19, 2011, at 11:39 AM, Allen Wirfs-Brock wrote:
> Ok, I did a side-by-side comparisons of some alternatives.
> Seehttp://wiki.ecmascript.org/lib/exe/fetch.php?id=harmony%3Aspecification_drafts&cache=cache&media=harmony:protooperator_alternatives.pdf
>
>
> The first column is by prototypal inheritance example using<| and <& from the
> first message in this thread.
>
> The second column is the same example with <| and <& replaced by keyword
> operators "prototypes" and "extendBy".
Nit-pick here, but: No! Never camelCaps in keywords. Consider instanceof.
Please try another word, perhaps "copies".
> The third column uses Object.specialize and Object.extend calls instead of <|
> and <&.
>
> Note that Object.create can't be used instead of Object.specialize because I
> want the second argument to be a regular object literal rather than a
> property descriptor.
"specialize" is ambiguous with respect to copying vs. delegating. How about
Object.delegate(to, from)? Or Object.clone, a Self homage?
It's hard to love the keyword forms, and many clearly choke on the punctuator
stew. That plus the "usable from downrev scripts" lends weight to
Object.{clone,extend}.
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