Re: [racket-dev] Web continuations interaction with BSL

2010-09-06 Thread Jay McCarthy
Short: I've just pushed a fix. Long: The student languages disallow reading "dotted" pairs like '(1 . 2) which the Web server uses when encoding continuation identifiers into URLs. This restriction is in effect for the dynamic extent of the evaluation of a student program. The fix is to explicitly

[racket-dev] =?

2010-09-06 Thread Shriram Krishnamurthi
Is there a reason =? isn't bound? I see (in Guillaume's logs) students actually getting errors because they tried to use it. _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev

Re: [racket-dev] typed/scheme n00b question

2010-09-06 Thread Sam Tobin-Hochstadt
On Sun, Sep 5, 2010 at 5:30 PM, Eli Barzilay wrote: > > I think that this is the type for `file-or-directory-modify-seconds': > >  (case-lambda >    [String -> Exact-Nonnegative-Integer] >    [String (Option Exact-Nonnegative-Integer) >            -> (U Exact-Nonnegative-Integer Void)] >    [Strin

Re: [racket-dev] [plt-dev] 2htdp/image: Where oh where have my pinholes gone?

2010-09-06 Thread Robby Findler
Returning to an old thread, I've just pushed changes to 2htdp/image that add pinholes. If Carl or anyone else has enough interest to try them out, feedback would be welcome. Ian and I went with a similar plan, but not exactly what Carl suggested. Robby

Re: [racket-dev] typed/scheme n00b question

2010-09-06 Thread Eli Barzilay
On Sep 6, Sam Tobin-Hochstadt wrote: > On Sun, Sep 5, 2010 at 5:30 PM, Eli Barzilay wrote: > > > > I think that this is the type for `file-or-directory-modify-seconds': > > > >  (case-lambda > >    [String -> Exact-Nonnegative-Integer] > >    [String (Option Exact-Nonnegative-Integer) > >