[plt-dev] Release Announcement for v4.2.4

From: Robby Findler (robby at eecs.northwestern.edu)
Date: Thu Jan 28 15:09:23 EST 2010

Sorry for the confusion: I meant that the bullet beginning with "the
2htdp/image library continues to grow" should remain.

I think you got it all figured out now, tho. Those are the right
bullets. I think the currently second one should move up to being
first and the other two stay in the same order.


On Thu, Jan 28, 2010 at 2:01 PM, Eli Barzilay <eli at barzilay.org> wrote:
> On Jan 28, Robby Findler wrote:
>> No, Matthias's bullets do not supercede my bullet about 2htdp/image.
>> Please restore it.
> But the paragraph you had with "Added a porting guide that explains
> how to turn `htdp/world' programs into `2htdp/universe' and
> `2htdp/image' programs." should be gone, right?
> If so, then I have these three bullets now -- inmcluding your revision
> to the middle one.  Is this fine?  Is the order between them fine?  (I
> did verify the url, it will work after the release is over.)
>    * The `2htdp/image' library continues to grow.  In this release, it
>      is supported by `2htdp/universe', equality changed to be based
>      on how the images are drawn, cropping and curves were added, and
>      support for more kinds of pens were added.
>    * 2htdp/universe: We have severed the connection between universe
>      and an image library and made a few other, minor changes.  Most
>      programs will now have to change to require the htdp/image
>      library explicitly.  For the full details, see the new Porting
>      World Programs section of the documentation:
>        http://docs.plt-scheme.org/teachpack/2htdphtdp-port.html
>    * htdp/world: The old world teachpack remains deprecated.  HtDP/2e
>      exclusively uses the new 2htdp/universe library.  For backwards
>      compatibility, the world teachpack will remain in the distribution
>      until the coming summer.
> --
>          ((lambda (x) (x x)) (lambda (x) (x x)))          Eli Barzilay:
>                    http://barzilay.org/                   Maze is Life!

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