Brendan Eich wrote:
I will stop the over-citing madness here and now :-P.
The struggle to formalize ArrayLike, which seems like a common goal for
ES the core language and for WebIDL's ES bindings, makes me want to give
an exception to the "catchalls considered harmful for new interfaces"
injunction. I agree that indexing into array-likes, with no liveness
magic, seems containable and desirable. ES folks haven't nailed down
ArrayLike yet (our fault) and we would benefit from collaboration with
WebIDL folks here.
So if you are doing more ArrayLike interfaces, let's keep talking. Don't
let at least my catchalls-considered-harmful statements stop progress on
ArrayLikes.
I expect some ES folks may demur now :-).
I am on the record for strongly opposing catch-alls. It's unproductive to
repeat the reasons because that would sidetrack the discussion and the reasons
mentioned by Brendan are sufficient to make the idea deeply flawed. We've gone
around that rathole many times in the past.
However, I have no particular objections to making additional kinds of
array-like objects. This does not suffer from the same problems that catchalls
in general do.
Waldemar
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