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An opinionated guide to Haskell

lexi-lambda.github.io

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Re: An opinionated guide to Haskell

#21

Post by chillee »

pdpi wrote: post #8
dvddgld wrote: post #2

Learning Haskell is one of those two weeks things that’s been on my interests list for a long time, but will likely stay there for awhile yet. Though, if anyone has got any high-quality quick resources handy that’d be appreciated!

If you’re in it for the two-week thing rather than the long term, “learn you a Haskell for great good” is a good choice. Not terribly informative if your goal is writing large applications, but pretty good introduction to the mindset that goes with writing haskell

To elaborate on LYAH, I think it's a pretty bad resource for actually learning Haskell. It's very "here's a feature, now copy it". Which works fine for learning syntax, but works poorly for learning Haskell.

Check here for a review that really resonated with my experiences about LYAH:

http://bitemyapp.com/posts/2014-12-31-functional-education.h...

Note the author of that post is also the author behind the Haskell book, which is also what I'd recommend currently.

Re: An opinionated guide to Haskell

#22

Post by Tomte »

xfer wrote: post #17
resoluteteeth wrote: post #9

I've tried messing around with haskell a few times, but the biggest problem I have is the tooling. I just tried to get haskell set up a few days ago and I couldn't get it working with either vscode or Idea. I also couldn't get ihaskell (jupyter notebook) installed successfully. I might give it another shot based on these instructions, but the fact that pretty much every program seems to make different assumptions abo…

How is Ocaml tooling worse than rust? Merlin is very powerful and it gives me everything i want from an editor integration. I still can't get point-at type to work in emacs/vim for rust reliably(macros make it even worse). Haskell tooling is good enough(i haven't worked on big projects, so maybe it doesn't scale) now with intero if you use emacs.

Is OPAM finally abailable for Windows? If not, it‘s definitely worse.

That‘s something Rust got very right from the beginning.

Re: An opinionated guide to Haskell

#23

Post by resoluteteeth »

OK, I am trying to install haskell again using the instructions given in this guide.

I removed my existing stack installation and my .stack directory, installed stack again, created a new stack project and then ran the recommended command in the guide to install ghc-mod and related tools: "stack build -j 8 --copy-compiler-tool ghc-mod hoogle weeder".

I get an error:

Error: While constructing the build plan, the following exceptions were encountered:

In the dependencies for ghc-mod-5.8.0.0: Cabal-2.0.1.1 from stack configuration does not match >=1.18 && ...etc.

Can someone explain what's causing this?

Re: An opinionated guide to Haskell

#24

Post by farresito »

dvddgld wrote: post #2

Learning Haskell is one of those two weeks things that’s been on my interests list for a long time, but will likely stay there for awhile yet. Though, if anyone has got any high-quality quick resources handy that’d be appreciated!

Haskell is so far the language that has blown my mind the most, and it's not even close. Admittedly, I haven't learned that many (esoteric) languages (I found Prolog very peculiar, for example), but if you have never done any functional programming before, Haskell will (hopefully) blow your mind as well.

Re: An opinionated guide to Haskell

#25

Post by jadbox »

When I look at many modern Haskel guides, they all seem to recommend adding all these extensions/sugar into your code. If these things are so common to use, why doesn't Haskel adopt them into core?

Re: An opinionated guide to Haskell

#26

Post by danharaj »

resoluteteeth wrote: post #9

I've tried messing around with haskell a few times, but the biggest problem I have is the tooling. I just tried to get haskell set up a few days ago and I couldn't get it working with either vscode or Idea. I also couldn't get ihaskell (jupyter notebook) installed successfully. I might give it another shot based on these instructions, but the fact that pretty much every program seems to make different assumptions abo…

Haskell + Nix is the best environment I've ever used for any development. My go-to project manager is this script in the reflex-platform, which is a bit poorly named (it will change eventually), because it's actually an environment for doing general cross-platform full stack Haskell development: https://github.com/reflex-frp/reflex-platform/blob/develop/p...

The learning curve is definitely, shamelessly high. We've been slowly polishing it to make it easy for complete beginners to fully up-to-speed on a project in minutes, but it's a lot of work that happens mostly on weekends.

Watch this space!

Re: An opinionated guide to Haskell

#27

Post by badwebsite »

jadbox wrote: post #25

When I look at many modern Haskel guides, they all seem to recommend adding all these extensions/sugar into your code. If these things are so common to use, why doesn't Haskel adopt them into core?

Haskell is a standardized language that moves very slowly. Some of the extensions may be integrated into Haskell2020.

Re: An opinionated guide to Haskell

#28

Post by s4vi0r »

resoluteteeth wrote: post #23

OK, I am trying to install haskell again using the instructions given in this guide. I removed my existing stack installation and my .stack directory, installed stack again, created a new stack project and then ran the recommended command in the guide to install ghc-mod and related tools: "stack build -j 8 --copy-compiler-tool ghc-mod hoogle weeder". I get an error: Error: While constructing the build plan, the follo…

Cabal version too high. Did you have a pre existing cabal installation independent of stack or something?

Re: An opinionated guide to Haskell

#29

Post by joeblau »

resoluteteeth wrote: post #9

I've tried messing around with haskell a few times, but the biggest problem I have is the tooling. I just tried to get haskell set up a few days ago and I couldn't get it working with either vscode or Idea. I also couldn't get ihaskell (jupyter notebook) installed successfully. I might give it another shot based on these instructions, but the fact that pretty much every program seems to make different assumptions abo…

What operating system are you running on? I paid for and downloaded Haskell For Mac[1] and it's been a great dev experience so far. The IDE is similar to Xcode (I'm an iOS developer) and the REPL is great for trying stuff out.

[1] - http://haskellformac.com

Re: An opinionated guide to Haskell

#30

Post by Buttons840 »

danharaj wrote: post #26
resoluteteeth wrote: post #9

I've tried messing around with haskell a few times, but the biggest problem I have is the tooling. I just tried to get haskell set up a few days ago and I couldn't get it working with either vscode or Idea. I also couldn't get ihaskell (jupyter notebook) installed successfully. I might give it another shot based on these instructions, but the fact that pretty much every program seems to make different assumptions abo…

Haskell + Nix is the best environment I've ever used for any development. My go-to project manager is this script in the reflex-platform, which is a bit poorly named (it will change eventually), because it's actually an environment for doing general cross-platform full stack Haskell development: https://github.com/reflex-frp/reflex-platform/blob/develop/p... The learning curve is definitely , shamelessly high. We've…

Your go-to project manager is a script? Even if you did not intend it that way that is my impression of the reflex platform. Many have heard about the divide in Haskell package management between cabal-install and stack, but there is also reflex, which seems to rely on running arbitrary bash scripts and using Nix, thus leading to a third method of package management in Haskell. It's a big mess.
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