#racket on 2020-03-15 — irc logs at freenode.irclog.whitequark.org

2020-02-20 18:27 samth changed the topic of #racket to: Racket v7.6 has been released: https://blog.racket-lang.org/2020/02/racket-v7-6.html -- Racket -- https://racket-lang.org -- https://pkgs.racket-lang.org -- Paste at http://pasterack.org

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16:54 <bremner> Is there something like case which expands the values tested against? http://pasterack.org/pastes/20173

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17:01 <bremner> I guess I can write my own macro, it just seems like reinventing the wheel a bit.

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17:12 <bremner> I guess I'll go with define-syntax-rule for now. http://pasterack.org/pastes/59308

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17:48 <gebrek> is there some way to use a polygon to mask an image?

17:50 <gebrek> i'm using 2htdp/image. or should i invert the polygon to cover the rest of the image

17:56 <bremner> ugh, I guess my macro evaluates v too many times

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18:16 <samth> bremner: you want `evcase`

18:20 <bremner> ah. thanks. The full story is that I want to use it in '#lang plait' for teaching, but I can minimally re-use the name.

18:27 <bremner> I think I'll stick with my cheezy define-syntax-rule version, since the class nominally knows about define-syntax-rule

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