I have pushed a repair for the teaching languages. The Racket docs for git head
seem to be okay.
On Sep 12, 2014, at 6:21 PM, Patrick Useldinger wrote:
> Hi all,
>
> according to the documentation, the above procedure accepts a *number* and
> returns an integer.
>
> But (at least in Racke
The docs contradict themselves here :-)
On Sep 12, 2014, at 6:27 PM, Robby Findler wrote:
> The docs, I believe.
>
> Robby
>
> On Fri, Sep 12, 2014 at 5:21 PM, Patrick Useldinger
> wrote:
>> Hi all,
>>
>> according to the documentation, the above procedure accepts a *number* and
>> return
To make the program concrete, suppose we have "a.rkt" as
#lang racket/base
(define (epipe? x)
(and
(exn:fail:filesystem:errno? x)
(equal? '(32 . posix) (exn:fail:filesystem:errno-errno x
(define (epipe-handler x)
"ignore")
(with-handlers ([epipe? epipe-handler])
(let loo
The docs, I believe.
Robby
On Fri, Sep 12, 2014 at 5:21 PM, Patrick Useldinger
wrote:
> Hi all,
>
> according to the documentation, the above procedure accepts a *number* and
> returns an integer.
>
> But (at least in Racket 6.1) there's an error message stating that the
> parameter needs to be
Hi all,
according to the documentation, the above procedure accepts a *number*
and returns an integer.
But (at least in Racket 6.1) there's an error message stating that the
parameter needs to be an *integer*:
---
> (integer-sqrt 151.29)
integer-sqrt:
I've pushed a fix for DrRacket so that it limits online expansion to
the same limits that are in place for running programs.
Thanks,
Robby
On Mon, Sep 8, 2014 at 4:23 PM, Sean Kanaley wrote:
> After investigating a near complete lock up some more (saved by TTY window
> and killing DrRacket after
On Sep 12, 2014, at 4:40 PM, Daniel Bastos wrote:
> Again, we start with (2) and apply a series of substitutions.
>
> (f f)
> = ( ) ;; since f is a
> = ( ) ;; since is a subset of
>
> However, ( ) is not by definition a value. It is an
> expression which may or may not /have/ a val
On Mon, Sep 8, 2014 at 9:51 PM,
Matthias Felleisen wrote:
On Sep 2, 2014, at 11:45 AM, Daniel Bastos wrote:
>
> > A candidate for a solution.
> >
> > Exercise 20.1.1. Assume the Definitions window in DrScheme contains
> > (define (f x) x). Identify the values among the following expressions:
> >
Hi Matthias, nice to meet you! Yes, this was what I was looking for.
For the records:
(define (epipe? x)
(and
(exn:fail:filesystem:errno? x)
(equal? '(32 . posix) (exn:fail:filesystem:errno-errno x
(define (epipe-handler x)
"ignore")
(with-handlers
((epipe? epipe-handler))
tran
On Mon, Sep 8, 2014 at 9:51 PM,
Matthias Felleisen wrote:
On Sep 4, 2014, at 12:54 PM, Daniel Bastos wrote:
>
> > A candidate for a solution. (I'm not sure I'm correct regarding the
> > function project. The description says "a lists of lists" (which I
> > translate to (listof ITEM)) and "a funct
Yes, this is very helpful. Thank you.
-Jon
On Fri, Sep 12, 2014 at 10:47 AM, Matthias Felleisen
wrote:
>
> Does this sketch help:
>
> #lang racket
>
> ;; define a header file language
> (module L racket
> ;; specification
> (provide export)
> ;; ---
Does this sketch help:
#lang racket
;; define a header file language
(module L racket
;; specification
(provide export)
;; --
;; implementation
(define-syntax (export stx)
(syntax-case stx ()
[(_ file name ctc)
#'(define-s
Matthias,
Would you be willing to elaborate on this a bit? Specifically, how is
the header specified?
Thanks,
Jon
On Thu, Sep 11, 2014 at 10:35 AM, Matthias Felleisen
wrote:
>
> For a project last year, I developed a suite of syntactic abstractions
> that expand into contracted provides. With
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