- From: Ian Hickson <ian@hixie.ch>
- Date: Fri, 11 Mar 2011 01:47:46 +0000 (UTC)
- To: Cameron McCormack <cam@mcc.id.au>
- cc: Anne van Kesteren <annevk@opera.com>, Simon Pieters <simonp@opera.com>, Arun Ranganathan <arun@mozilla.com>, public-webapps <public-webapps@w3.org>
- Message-ID: <Pine.LNX.4.64.1103110142430.944@ps20323.dreamhostps.com>
On Fri, 11 Mar 2011, Cameron McCormack wrote: > Ian Hickson: > > Web Apps 1.0 will change if you need it to. Don't constrain on my account > > here. I'll do whatever you think we should do. The only places I use it > > are in an argument to a method because I want to allow authors to pass in > > literal JS Arrays of values, and on a NodeList descendant where I just > > wanted the user of the API to be able to get a JS Array of values. I don't > > think there's much implementation compatibility constraint here. > > OK. > > The latter isn’t a good use, BTW, as mentioned in the reply to Anne, > because it would mean a fresh Array object is constructed each time you > get the values property of PropertyNodeList. So for what you might > expect to be a common usage pattern, > > for (var i = 0; i < myPropertiesCollection.values.length; i++) { > doSomethingWith(myPropertiesCollection.values[i]); > } > > it’s going to result in a lot of wasted work. To make it clear that’s > going to happen, I’d recommend making it a method instead. Makes sense. What I really want is a NodeList-like interface, but ideally one that supports all the Array accessors, but I don't want to have to redefine it each time. Is there some way we could get a "macro" for that kind of thing? See also: http://www.w3.org/Bugs/Public/show_bug.cgi?id=11195 > I think sequence<T> is fine for the purpose of accepting a JS Array of > items as a method argument. Presumably the requirement to have > something like that in WA 1.0 isn’t going away, and there isn’t > another way to do that in Web IDL currently, so unless there are > concrete problems with sequence<T> or anyone has ideas on how to do it > better, I’ll just leave it alone for now. Is there some way we can make it only be allowed in arguments to host-implemented APIs? -- Ian Hickson U+1047E )\._.,--....,'``. fL http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,. Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
Received on Friday, 11 March 2011 01:48:16 UTC