Whither extension methods?

[Mark Mahieu]

There are other (longer) versions linked at:

	http://research.sun.com/projects/plrg/Publications/index.html

Video of the most recent talk on that page can be found here:

	http://www.vimeo.com/6624203


Mark


On 15 Dec 2009, at 15:37, Joshua Bloch wrote:

> Not that I know of.  It sure would be nice.
> 
>           Josh
> 
> On Tue, Dec 15, 2009 at 4:42 AM, Roel Spilker <r.spilker at gmail.com> wrote:
> 
>> Josh, or Doug,
>> 
>> Is there also a video or audio recording of Guy Steele's talk? I couldn't
>> easily find it using my favorite search engine :-)
>> 
>> Roel
>> 
>> On Tue, Dec 15, 2009 at 8:46 AM, Joshua Bloch <jjb at google.com> wrote:
>> 
>>> Doug Lea sent this a couple of days ago, and I think it deserves our
>>> consideration:
>>> 
>>> I confess to being a little confused about the rationale for extension
>>>> methods.
>>> 
>>> 
>>>> Suppose we have a Map, and want to some sort of apply-to-each-value
>>>> operation. The only reasonable way to do this in parallel is to somehow
>>>> splitthe work. But Map has no public methods allowing you to do this --
>>> you
>>>> can only get an iterator, which is inherently sequential. Now, if we
>>>> could get at the representations, then we could actually do splits for
>>> most
>>>> java.util maps (at least for the most common ones -- HashMaps,
>>> TreeMaps). So
>>>> the only way I know for these to be bolted on is to introduce new
>>> interfaces
>>>> that each of the these existing classes could be changed to implement.
>>> Or am
>>>> I missing something?
>>> 
>>> 
>>>> You might want to read Guy Steele's nice talk on related issues at
>>>> 
>>> http://groups.csail.mit.edu/mac/users/gjs/6.945/readings/MITApril2009Steele.pdf
>>> 
>>> 
>>>> -Doug
>>> 
>>> 
>> 
>