On Mon, Mar 02, 2020 at 12:54:41PM -0700, Matthew Flatt wrote:
> A snapshot catalog only lasts for a limited time, and v7.4.0.1 was a
> very long time ago in snapshot terms.
I see. That's what I suspected.
>
> So, the short answer is to upgrade to a new snapshot --- or switch to a
> release, whi
London Racket Meet-up
Thursday 9th April 1-2pm
Meet at 1pm at ‘The Last Word’ (cafe)[1] and after introductions we will
move to The Alan Turing Institute[2].
[1] The Last Word (cafe in front of British Library)
96 Euston Rd, London NW1 2DB
Google maps: https://goo.gl/maps/SbUeExYddSnWPQbz6
[2]
> On Mar 3, 2020, at 10:48 AM, Jon Zeppieri wrote:
>
> On Tue, Mar 3, 2020 at 12:37 PM Kevin Forchione wrote:
>>
>> Thanks! That brings me a little closer in appreciating the comments I’ve
>> read about replacing object-oriented code with structs and methods.
>>
>> Is this part of the rac
On Tue, Mar 3, 2020 at 12:37 PM Kevin Forchione wrote:
>
> Thanks! That brings me a little closer in appreciating the comments I’ve
> read about replacing object-oriented code with structs and methods.
>
> Is this part of the racket/generic or the Multimethods library? The example
> you provide
> On Mar 3, 2020, at 9:19 AM, Jon Zeppieri wrote:
>
> (struct A (this other) #:transparent
> #:methods gen:foo
> [(define/generic generic-foo do-foo)
> (define (do-foo foo)
> (printf "other=~a ~a"
> (A-this foo)
> (generic-foo (A-other foo])
Thanks! That b
Kevin,
This is what `define/generic` is for. In your example:
On Tue, Mar 3, 2020 at 11:08 AM Kevin Forchione wrote:
>
> (struct A (this other) #:transparent
> #:methods gen:foo
> [(define (do-foo foo)
> (printf "other=~a ~a"
> (A-this foo)
> (do-foo (A-other f
Hi guys,
If I create a generic, say foo, for a particular struct and then later
reference that method on a different type of struct from within the handler
method I get an error because the call goes to the original structs method and
not to the method of the other struct. Is there a way to do t
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