soegaard

33 ms·

1. 421.▲
   by soegaard 8y ago

   An often over-looked point: If you use tail calls to implement a loop, you aren't really interested in seeing the stack trace. Compare with a standard for-loop: you aren't interested in seeing all states of the for-loop in a sta
2. 422.▲
   by soegaard 8y ago

   "For that reason alone I think tail call elimination is a must, especially in today's transpiling world." This is an important insight. I feel the JavaScript implementors are dragging their on getting tail call elimination wi
3. 423.▲
   by soegaard 8y ago

   Note that all identifiers in the code examples are links to documentation.
4. 424.▲
   by soegaard 8y ago

   In case anyone wonders what a flanery is: https://cs.uwaterloo.ca/~plragde/flaneries/
5. 425.▲
   by soegaard 8y ago

   See the section "Acknowledgements": https://cs.uwaterloo.ca/~plragde/flaneries/FDS/Sources_and_R...
6. 426.▲
   by soegaard 8y ago

   Problem? That's by design.
7. 427.▲
   by soegaard 8y ago

   Also Why John Carmack thinks Racket is aces for beginning programmers - The creator of creator Doom explains why his 10 year-old son used the Racket programming language to create his latest video game" https://www.itworld.c
8. 428.▲
   by soegaard 8y ago

   http://racket-lang.org/new-name.html
9. 429.▲
   by soegaard 8y ago

   Regarding multiple languages in the same file. Check out: http://docs.racket-lang.org/multi-file-lang/index.html
10. 430.▲
    by soegaard 9y ago

    http://blog.racket-lang.org/2018/01/racket-on-chez-status.ht...
11. 431.▲
    by soegaard 9y ago

    +10 TCO is indispensable, when a language is used as the target language for a compiler.
12. 432.▲
    by soegaard 9y ago

    Thanks for the link - it looks great.
13. 433.▲
    by soegaard 9y ago

    > A language extension means the syntax wouldn't ever be > valid in the base language. Well, this works: #lang base-without-for (require the-for-library) ...use for here... Of course if the author of `for` has
14. 434.▲
    by soegaard 9y ago

    There is even a pcb version: http://forum.ulisp.com/t/tiny-lisp-computer-2-pcb/66
15. 435.▲
    Tiny Lisp Computer 2(forum.ulisp.com)

    6 points by soegaard 9y ago|2 comments
16. 436.▲
    by soegaard 9y ago

    Don’t forget to check Leif Andersen’s video language https://lang.video/ It is a Racket language for editing videos. Quite handy when you need to edit many, similar conference videos.
17. 437.▲
    by soegaard 9y ago

    For comparison, a Pascal compiler in Racket: https://github.com/soegaard/minipascal
18. 438.▲
    by soegaard 9y ago

    The license will soon(ish) change: https://github.com/racket/racket/issues/1570
19. 439.▲
    Racket-On-Chez Status(blog.racket-lang.org)

    147 points by soegaard 9y ago|18 comments
20. 440.▲
    by soegaard 9y ago

    The standard Racket threads do run on a single core. Racket (not Arc) does however support two forms of parallelism, namely futures and places. http://docs.racket-lang.org/guide/parallelism.html
21. 441.▲
    “Variables” in CSS are harmful (2008)(w3.org)

    31 points by soegaard 9y ago|48 comments
22. 442.▲
    by soegaard 9y ago

    These days `first` and `rest` is used in Racket to indicate the input is a list. Since `cons` can build non-lists, the traditional `car` and `cdr` are used when working on trees. Well - actually most Racket programmers use pattern matching
23. 443.▲
    by soegaard 9y ago

    https://en.wikipedia.org/wiki/Munsell_color_system
24. 444.▲
    by soegaard 9y ago

    Use Overcast.
25. 445.▲
    by soegaard 9y ago

    First of all the `@` means we are dealing with a an inexact ‹inexact-complexn› ::= ‹inexact-realn› @ ‹inexact-realn› Here is a short guide: #e means exact #x means hexadecimal So `#e#x+e` means exact 14. The last `#` in
26. 446.▲
    by soegaard 9y ago

    Chrome has removed support for tail recursion (it was briefly enabled). Does anybody know if there are plans to reenable it? Or are they still lobbying for an explicit keyword approach?
27. 447.▲
    by soegaard 9y ago

    Lots of database options! See https://docs.racket-lang.org/db/
28. 448.▲
    by soegaard 9y ago

    High School students in Denmark are taught How to use a CAS (Nspire, GeoGebra’s algebra window, Maple or similar). To test that they know a Cas, some exercises contain equations, deriviates or integrals that only a cas can solve (or at leas
29. 449.▲
    by soegaard 9y ago

    In Denmark most high schools assume students bring their own laptop.
30. 450.▲
    by soegaard 9y ago

    Some context: All danish high school students have their own laptop. Exams are supposed be a test of what the students have learned during the course (for the written exams this means during the last two or three years). To make exams refle