soegaard

74 ms·

1. 481.▲
   Inside Racket Seminar 6 – Sam Tobin-Hochstadt on Match(youtube.com)

   3 points by soegaard 10y ago|0 comments
2. 482.▲
   by soegaard 10y ago

   Racket can compile a racket source file to platform independent bytecode (stored as zo-files). When the bytecode is run, it isn't interpreted, but a just-in-time compiler kicks in, generates machine code, and the code is run. As far as
3. 483.▲
   by soegaard 10y ago

   I hope you have filed a bug report? (Also - did you use the official version from download.racket-lang.org ?)
4. 484.▲
   by soegaard 10y ago

   Note that there is a new implementation of Hendersons's picture language. Color images is just one of the new features. Save this file. Open it. Either add your own code at the bottom or use require to use it from another file. https:
5. 485.▲
   by soegaard 10y ago

   Just a quick note to inform you that Racket now uses a new model for macro expansion. It is based on sets of scopes rather than the mark model used in syntax-case. http://www.cs.utah.edu/plt/scope-sets/ The
6. 486.▲
   by soegaard 10y ago

   Dan Liebgold: Racket on the Playstation 3? It's Not What you Think! Video: http://www.youtube.com/watch?v=oSmqbnhHp1c Slides: https://con.racket-lang.org/2013/danl-slides.pdf
7. 487.▲
   by soegaard 10y ago

   The Ragg tutorial uses Brainfuck as an example of how to use "compile a language by macros". The grammar of the input language is specified as BNF and the output is a syntax object representing Racket forms. Syntax objects are nor
8. 488.▲
   by soegaard 10y ago

   If only you had told me twenty years ago.
9. 489.▲
   by soegaard 10y ago

   Scheme has historically been used as a research vehicle for macros. When the fifth revised specification of Scheme (known as R5RS) was written there were no consensus on the best practices for writing a system supporting unhygienic macros.
10. 490.▲
    by soegaard 11y ago

    Look at Clinger's benchmarks for Larceny.
11. 491.▲
    by soegaard 11y ago

    It should support all of JavaScript. If you find a construct not supported, file a bug. Since Urlang has not been released on pkgs.racket-lang.org yet, clone the Github repo. And then use the Package Manager in DrRacket (or use raco) to ins
12. 492.▲
    by soegaard 11y ago

    Actually Urlang is like JavaScript. The syntax is different, the semantics are the same. Except that I signal error for unbound identifiers (and DrRacket will show where in the source code). Also I allow names with dashes in them. As an add
13. 493.▲
    by soegaard 11y ago

    Here Ur just means something simple. Also urlang is a bad pun. It sounds like Erlang (whom the programming language Erlang is named after), who grew up near where I live.
14. 494.▲
    by soegaard 11y ago

    > Racket ( https://racket-lang.org/ ) comes with a GUI toolkit > that was originally forked from wxWidgets. The GUI was rewritten in 2005 and there are no signs of wxWidgets left ( http://blog.racket-lang.org
15. 495.▲
    by soegaard 11y ago

    I have a compile-to-Racket implementation of a Pascal subset here: https://github.com/soegaard/minipascal There are two versions. The first one https://github.com/soegaard/minipascal/blob
16. 496.▲
    by soegaard 11y ago

    Nice work!
17. 497.▲
    by soegaard 11y ago

    This is it. An example: (1/3)*3.-1 gives -1E-14
18. 498.▲
    by soegaard 11y ago

    I tried some variations before I posted, but the result was just 0.
19. 499.▲
    by soegaard 11y ago

    Anyone care to explain the details on a Texas Instruments NSpire calculator (or CAS)? a:=0.1+0.2 b:=0.3 a-b |> 0. Using the non-exact mode.
20. 500.▲
    by soegaard 11y ago

    There are some improvements in Buchheim et al: ; http://dirk.jivas.de/papers/buchheim02improving.pdf See also "Compact layout of Layered Trees". Note that Bill Mill's blog post "Drawing Prese
21. 501.▲
    by soegaard 11y ago

    Works in Chrome.
22. 502.▲
    Bootstrapping Ikarus Scheme(groups.google.com)

    24 points by soegaard 11y ago|2 comments
23. 503.▲
    by soegaard 11y ago

    A place to start: http://docs.racket-lang.org/mzlib/mzlib_awk.html?q=awk "AWK" in Racket.
24. 504.▲
    by soegaard 11y ago

    Take a look that the rrrs mailing list archive.
25. 505.▲
    by soegaard 11y ago

    1/10 is a literal. It denotes the value one tenth. The expression (/ 1 10) will at runtime calculate 1 divided by 10. Most programming languages have syntax for writing all available numbers as literals. Racket do not have builtin
26. 506.▲
    by soegaard 11y ago

    If you happen to be on a Linux machine, yes. If you have, say, an Windows machine - you need a friend to make the executable.
27. 507.▲
    by soegaard 11y ago

    Racket programs runs on many platforms including Linux. In DrRacket you can choose the "Create Executable..." to package your Racket program with the files needed to run the program (without the user installing Racket). Since this
28. 508.▲
    by soegaard 11y ago

    That's interesting. Why was it a dead end? Was it due to the (too dynamic) semantics of Arc? Or perhaps you have too much code written in standard Arc to make infeasible to port?
29. 509.▲
    by soegaard 11y ago

    I found Arc version 3.1 on arclanguage.org. It does compile to (Mz)Scheme - but it does not use the MzScheme macro expander. It reads Arc program as an s-expression. Compiles the program and produces an mzscheme program also represented as
30. 510.▲
    by soegaard 11y ago

    Judging from the code, the main idea is to implement the Arc (or Arc-like) language using the standard techniques used to implement new languages in Racket. This approach will make it easy to use the tools/infrastructure of Racket with