this post was submitted on 19 Apr 2024
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Out of curiosity, what kind of data do you generate with Haskell? And would be willing to show an example of a one or two liner that generates the data? ๐
Uh, let's look at my GHCi history...
It looks like I was last searching for 12-member sets of permutations of 7 which come close to generating every possible permutation of seven elements, as well as meeting a few other criteria, for an electronics project. It ended up being more like 10 lines plus comments, though, ~~plus a big table generated by GAP, which I formatted into a Haskell list using probably a line of Haskell plus file loading.~~
Unfortunately for providing code, me playing with the finished algorithm has eaten up my whole 100 lines of history. So, here's a two-liner I posted on Lemmy before, that implements a feed-forward neural net. It's not exactly what you asked for, but it gives you an idea.
In practice, you might also need to define relu in another line:
relu x = if x > 0 then x else 0
Edit: No wait, I think that was a different problem related to the same project. There's another module attached that generates all permutations of n items. After breaking it up so it's a bit less write-only:
BTW: I think you need to put the "```" on separate lines.
test
Edit: huh, nope, that had no difference in effect for me. Wonder why your code doesn't render for me...
Which frontend are you on? I'm using lemmy-ui (the default webapp) and it renders fine, not sure how to find which version.
I was using Sync for Lemmy when your comment didn't render properly. No idea why. Especially since my own comments were rendering fine. ๐คทโโ๏ธ
I'd guess it has to do with the specific symbols I was using, and there's a bug in rendering of markdown in Sync.
Maybe so!
Cool! Thank you for sharing!
I just recently read the man page for GNU Parallel, and that seems like a pretty nifty tool to generate permutations of data as well. It's command-line so great for scripts, utilizes many cores, quick to do without mind-bending Haskell project setup, etc..., for anyone interested. ๐๐
I'll look into it, although this probably wasn't directed at me. GHC can compile multi-threaded, and "setup" here was just opening GHCi and starting, and then moving it into files once it got large enough I didn't want to repeat the work, so I'm happy.
I still haven't been able to learn project setup with Haskell and know exactly what I'm doing lol. But I'm glad you have a working setup! But yeah, do look into parallel if you want, maybe it can prove useful, or not. It was directed at you, considering your use case of generating permutations. :-)
Take care!