ReReStartingHaskell
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This page (revision-8) was last changed on 12-Nov-2017 17:04 by john  

This page was created on 11-Nov-2017 15:20 by unknown

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ReReStartingHaskell
ReReStartingHaskell

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At line 1 changed one line
11-Nov-2017
11 Nov 2017: Re-re-starting my adventures in Haskell, for no particularly good reason.
At line 3 removed 2 lines
Re-re-starting my adventures in Haskell, for no particularly good reason.
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GitHub repo is here: [https://github.com/JohnL4/ProjectEuler]
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...aaaaand, now I have a blank editor in front of me. Now what?
!!! Output
{{putStr}} and {{putStrLn}} for printing to stdout. __NOTE:__ This only prints ''strings''. Use {{print}} as a more general-purpose output.
See this page: [2015-09-27-writing-a-simple-haskell-script-from-scratch]
So... the first problem is adding {{ghc}} to your path in emacs (if you use that editor).
!!! Stack
Actually, a better choice is to install {{stack}}, which manages the entire toolchain for you, kind of like {{npm}} does for Node.
See [https://docs.haskellstack.org/en/stable/install_and_upgrade/], and [http://haskell.github.io/haskell-mode/manual/latest/Compilation.html]. After that, you should be off to the races.
!!! Done
Ok, yay, me. I wrote a Haskell program in an afternoon, after a long break of not writing Haskell. I'm getting better at this!
(See [https://github.com/JohnL4/ProjectEuler/blob/master/Haskell/Problem001/app/Main.hs].)
...Aaaand, oh, darn, there are a couple of really elegant and obvious Haskell one-liners that do the same thing as my program. Dang it!
Oh well, at least I brushed up on my Haskell skillz. Sort of.
Actually, they're just shorter and maybe more obvious. They may not be more elegant because they start with a full list of integers in range [[1..999] and then eliminate invalid values.
This page (revision-8) was last changed on 12-Nov-2017 17:04 by john   Top

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