soegaard

19 ms·

121.
by soegaard 2y ago
"On the expressive power of programming languages" Matthias Felleisen https://jgbm.github.io/eecs762f19/papers/felleisen.pdf Abstract The literature on programming languages contains an abundance of info
122.
by soegaard 2y ago
> I was kinda hoping to see this was the next generation of Lisp language design, but it appears to be just a different syntax. Dig deeper in the reference documentation.
123.
by soegaard 2y ago
The operator `expr :~ annot` simply attaches the static information to the expression. The operator `expr :: annot` will at runtime insert a check that the expression satisfies the annotation.
124.
by soegaard 2y ago
The idea behind macros is so to speak to allow the programmer to extend the compiler. In a language like MetaPost I can use equations between variables: x + y = 10 x - y = 6 A reference to a variable x will use the current set o
125.
by soegaard 2y ago
The syntax `expr :~ annot` is used to annotate the expression with static information. This is different from type annotations. It's a general mechanism to associate an expression with "extra information" that can be used els
126.
by soegaard 2y ago
The reference manual for Rhombus is here: https://docs.racket-lang.org/rhombus/index.html Note that Rhombus is still a WIP, so a guide (and tutorials) will appear later.
127.
by soegaard 2y ago
Also, check out: https://docs.racket-lang.org/zuo/index.html
128.
by soegaard 2y ago
Processing (the original Java one) has inspired many libraries. These days it is possible to find (more-or-less) compatible libraries for most popular language. As a summer project I wrote a version for Racket: https://docs.racke
129.
Practically Accurate Floating-Point Math [pdf](cs.umd.edu)
1 points by soegaard 2y ago|0 comments
130.
by soegaard 2y ago
> 2) Repeat 1) choosing building by next height lower, unless lower building roof within range of an existing rendered roof x+width, then exclude that building from rendering. How do you implement the unless-part?
131.
by soegaard 2y ago
How do you efficiently choose the highest building in step 1?
132.
The Skyline Problem in Racket(jeapostrophe.github.io)
5 points by soegaard 2y ago|4 comments
133.
by soegaard 2y ago
I took the like from the frontpage. Maybe they want to attract non programmers and doesn't want to scare them with the word "programming"?
134.
by soegaard 2y ago
Or MetaPict [1]? It's inspired by MetaPost but uses a modern programming language (Racket). [1] https://docs.racket-lang.org/metapict/index.html
135.
by soegaard 2y ago
Poor guy doesn't have macros.
136.
by soegaard 2y ago
Penrose is a platform that enables people to create beautiful diagrams just by typing notation in plain text. https://penrose.cs.cmu.edu/
137.
Penrose – Tool for Diagrams(penrose.cs.cmu.edu)
27 points by soegaard 2y ago|15 comments
138.
by soegaard 2y ago
Click the links.
139.
Towards Fearless Macros – Ashton Wiersdorf(lambdaland.org)
2 points by soegaard 2y ago|0 comments
140.
Racket v8.13(blog.racket-lang.org)
28 points by soegaard 2y ago|6 comments
141.
by soegaard 2y ago
The highlight for me in this release is: The racket/treelist and racket/mutable-treelist libraries provide list-like containers that support many operations in effectively constant time, including appending and extracting sub-list
142.
by soegaard 2y ago
It's not the best algorithm for computing factorials though. A better strategy is to pair small and large factors together in order to avoid bignum computations (or to reduce the size og bignum computations). https://people.
143.
by soegaard 2y ago
A second indicates something is wrong. Most likely the `raco setup` part of the installation was skipped. Try `raco setup` and see if it helps. [I think, there were a snap at some point that had problems.]
144.
by soegaard 2y ago
As an example of other Schemes, here are the details of the representation used by Larceny (a Scheme): https://www.khoury.northeastern.edu/home/lth/larceny/notes/n...
145.
by soegaard 3y ago
> In Racket 8.9 you get: > abc: undefined; cannot reference an identifier before its definition > (no 'error' of any kind!) But that is an error. If you try this in the terminal, you will see that the me
146.
by soegaard 3y ago
Note that Discourse can be used in "mailing list mode", so you don't have to leave Emacs.
147.
by soegaard 3y ago
The story goes that one of Niels Bohr's friends visited him and found him deeply engrossed in writing an application to a fund. Surprised, the friend asked why it took so long for such a prominent scientist as Bohr to write a simple ap
148.
by soegaard 3y ago
https://www.youtube.com/watch?v=-xnppM6GG9Q
149.
Texas Instruments signing key controversy (2009)(en.wikipedia.org)
2 points by soegaard 3y ago|0 comments
150.
by soegaard 3y ago
Just checking - you are aware this is a new game under development? https://www.youtube.com/watch?v=4SB20aFHc08

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