#racket on 2020-04-01 — 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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00:49 <aeth> jcowan: On yesterday's topic on generalizing Racket-on-Chez support to general R6RS backend support, I just ballpark estimated 2 years, so it'll probably take 8 years...

00:50 <aeth> srandon111: Racket is a language, not just a language implementation. The main implementation has two backends so it's sort of like two implementations, with different performance characteristics, see the February 2020 status update: https://blog.racket-lang.org/2020/02/racket-on-chez-status.html

00:50 <aeth> (Now, I don't think that there is an independent implementation of Racket, but there might be one with JavaScript or WASM as the intended backend.)

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00:58 <bremner> there have been attempts. whalesong and another more recent one whose name escapes me

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02:03 <samth> aeth: pycket (github.com/pycket/pycket) is an independent implementation of Racket

02:04 <samth> aeth: but also, old Racket (Racket BC) and Racket CS are independent in an important sense

02:04 <samth> that is, there's a well-defined abstraction layer for the the code that runs on top of them, and they don't share code below that layer, except a separate C library

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07:42 <erkin> Is there a reason SXML and xexprs exist separately?

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07:43 <erkin> That is to say, why was the newer one created in spite of the older one?

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13:05 <srandon111> guys how much cross-platform is racket?

13:05 <srandon111> i mean if i develop a GUI app on linux will it work flawlessly on windows?

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14:07 <mingy> as far as I know,the package: https://blog.racket-lang.org/2017/10/tutorial-creating-a-package.html

14:08 <mingy> and,DrRacket is written by racket,and it work fine on windows and linux..

14:10 <srandon111> mingy, ok but can i use qt or gtk for GUIs?

14:14 <srandon111> guys is the h2tdp library used only for educational purposes or also as a general library to do other stuff?

14:15 <mingy> may this can be of help? https://docs.racket-lang.org/inside/

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14:19 <srandon111> mingy, i can't see how to load an image

14:19 <srandon111> i am using racket with ivm

14:19 <srandon111> *vim

14:19 <srandon111> but i see online many tutorials with drracket where you can simply drag and drop an image

14:19 <mingy> why not use the DrRacket

14:19 <srandon111> i cannot do that with vim

14:19 <srandon111> mingy, because i want to use vim

14:19 <srandon111> =)

14:19 <srandon111> drracket is not as powerful as vim

14:19 <srandon111> i have all my environment

14:20 <srandon111> and keybindings

14:20 <srandon111> how can i load an image with vim ?

14:20 <mingy> =_=

14:20 <srandon111> mingy, what?

14:21 <mingy> sorry,I have no experience using vim on racket.

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14:22 <srandon111> mingy, ok not only vim also emacs

14:23 <srandon111> i mean i just want to create a script from a text editor which loads an image

14:23 <srandon111> i have no drag and drop capabilities as with drracket

14:23 <srandon111> thiss should be something simple

14:23 <srandon111> unless racket is tighly coupled with the usage f drracket

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14:25 <mingy> https://stackoverflow.com/questions/18007640/importing-and-visualizing-pictures-in-racket-without-using-drracket

14:25 <rudybot> https://teensy.info/nztZKwUQPR

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14:26 <srandon111> thanks mingy

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15:52 <samth> srandon111: if you are using the 2htdp/image library, then you probably want the `bitmap/file`function

15:53 <samth> srandon111: the `racket/gui` library is built on Gtk on Linux, and uses the native toolkits on Mac and Windows

15:53 <samth> in general, programs using `racket/gui` should just work across platforms

15:54 <samth> erkin: SXML and xexprs both exist because people have different opinions about how to translate XML to S-expressions

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16:30 <bremner> I feel like I should know this, but the commends like ";; find-free-space : address size -> (or/c address #f)"

16:30 <bremner> are just comments right, racket is snooping the comments to deduce contracts or something like that?

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17:51 <samth> no, racket doesn't do that to comments

17:52 <bremner> Yeah, that sounded very-unrackety, but as you can tell I haven't worked with contracts much

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