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<bremner>
vxe: in theory, I suppose so, since raco is a thin wrapper around a racket library. In practice I have no idea how.
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<Bunogi>
I'm trying to install a package using raco, but it prints "ssl-make-client-context: requested protocol not supported;"
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<Bunogi>
ah, I needed libssl development packages on my syste
<bremner>
meh. that's a bug, but installing the packages is easier than a real fix.
<bremner>
there's some kind of mismatch between FFI (or at least the racket FFI), and the way most linux systems use shared libraries
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<samth>
vxe: see the pkg collection
<samth>
bremner: is racket looking for the wrong files?
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<bremner>
samth: well, it's all a bit heuristic. Conventially an executable is linked against a specific SONAME of a library, and assumes that any library with the same SONAME is compatible. racket has a list of SONAMEs that it tries, and then falls back on the unversioned name of the library. The latter is only needed at build time by "normal" executables. I guess it's more about using dlopen than FFI per se.
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<samth>
bremner: so then it sounds like more names need to be added
<bremner>
samth: probably. But it's a bit of a maintence nightmare.
<bremner>
I think I actually submitted an SSL related pull request to add some libraries for debian
<greghendershott>
lavaflow: To generate thumbnail files I would probably just `system` out to imagemagick's `convert`.
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<greghendershott>
lavaflow: Absent some specific reason not to do it that way. :)
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<lavaflow>
greghendershott: yeah that's the best option I've figured out so far
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<johnjay>
question: if you acn't learn from reading code
<johnjay>
then how can code ever be used to learn?
<johnjay>
racket is an explicitly educational project, yeah?
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<lexi-lambda>
johnjay: Why do you say you can’t learn from reading code?
<johnjay>
lexi-lambda: 3n+1
<johnjay>
you can write some code in a few lines to compute the 3n+1 problem
<johnjay>
but it's an unsolved problem in mathematics that the algorithm always produces 1
<johnjay>
it's literally like 5 lines of C code
<ZombieChicken>
?
<lexi-lambda>
I don’t understand how that’s related to your earlier statement. The 5 lines of C code can show you some sequence of hailstone numbers, and that can teach you things.
<lavaflow>
johnjay: once Socrates was giving a lecture to a crowd on his new definition of man, which he declared was a "featherless biped". Diogenese responded by plucking a chicken.
<johnjay>
Thus diogenese was proved correct
<johnjay>
my point is that sometimes code is educational depending on what you know and sometimes it isn't
<lexi-lambda>
Sure. But that’s awfully different from saying it never is!
<johnjay>
right. i agree with that
<lavaflow>
I think my point is that fancy epistemological analysis is all well and good, but sometimes you need to reground yourself in practical reality.
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<lavaflow>
(racket plainly has pedagogical value, even if there are tricky things going on with mathemetics and formal definitions of knowledge or whatnot)
<johnjay>
so do you just grab a racket module and learn from it
<johnjay>
i mean if you think so i can try it lol
<lavaflow>
yeah typically when I 'learn from code' I grab the code and documentation, read the documentation to figure out what the code is meant to do, then read the code and figure out how the code does what it's meant to do. often I won't understand it right away because the code is using functions or methods I was unaware of, in which case I dig into those one by one, or because the algorithm being used is new to
<lavaflow>
me. In either case I just keep on breaking things down into smaller and smaller pieces until each piece is small enough to 'click' for me.
<lavaflow>
recursive descent learning ;)
<lavaflow>
reading code is only part of learning though, another big part is writing code yourself. I find that's what actually sets your knowledge in stone so it sticks with you. racket is a nice language for this, imo.
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<lexi-lambda>
johnjay: I don’t think Racket’s educational purpose is achieved by just telling people to stare at code. :p
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<greghendershott>
lexi-lambda: I disagree. You can learn to be a good painter by just staring at paintings. No need to pick up a brush. ;)
* greghendershott
searches for the button to turn on the sarcasm warning light