koloron

10 lat temudiscuss

Here are two blog posts on free monads that should be accessible for people who understand what a monad is and are able to read Haskell:

http://www.haskellforall.com/2012/06/you-could-have-invented...

http://www.haskellforall.com/2012/07/purify-code-using-free-...

koloron

10 lat temudiscuss

Yeah, someone please write reverse-dependency-ci! :)

koloron

10 lat temudiscuss

> but it's still the best at what it does.

If "what it does" means "build complex software projects" I think your claim is rather debatable.

GHC is currently switching away from make after having already overhauled its make-based build system two times:

http://research.microsoft.com/en-us/um/people/simonpj/papers...

koloron

10 lat temudiscuss

Haskell: https://github.com/tweag/sparkle

koloron

10 lat temudiscuss

Hah, just today I started to read "Haskell programming from first principles"[1] which also targets non-programmers but builds on lambda calculus instead of assembly.

Would anyone actually recommend to a beginner to start learn assembly first?

[1]http://haskellbook.com/

koloron

10 lat temudiscuss

Nearly the same question was recently asked in r/haskell:

https://www.reddit.com/r/haskell/comments/4fhuw3/json_for_ad...

koloron

10 lat temudiscuss

Even better with mapMaybe:

    map transform . mapMaybe safeHead

koloron

10 lat temudiscuss

The project has existed only since last summer.

koloron

10 lat temudiscuss

If you're still using string types for pathnames you may want to check out the path and path-io packages. The path package defines a Path type parameterized by its locality (absolute or relative) and type (pointing at a file or a directory).

Especially the distinction between relative and absolute paths adds a nice safety layer.

koloron

10 lat temudiscuss

mcbuilder has already mentioned it, but I really want to emphasize that dependency management in Haskell is an entirely different story now with stack.

koloron

10 lat temudiscuss

IMO, the difference in readability has little to do with the difference between OOP and FP. What's important is the expressiveness of the language.

So Ruby can be very easy to read because you can simply keep appending methods to the right.

In Haskell you can do the same, only you'll prepend functions on the left, so you end up reading expressions from right to left:

    (intercalate ", " . map show . Map.elems) myMap

What I find really hard to read, are expressions where the direction of the data flow changes, something that often happens to me in Java:

    Streams.takeWhile(list.stream().map(e -> f(e)), e -> e.isNeeded())

koloron

10 lat temudiscuss

> It doesn't want to be Haskell or Lisp, those languages can be very hard to use and maintain for junior developers in large teams.

Can you expand a bit on the difficulties that these junior developers had with Haskell?

koloron

10 lat temudiscuss

I find ghcid very useful. It reloads your code automatically when it detects a filechange.

https://github.com/ndmitchell/ghcid http://neilmitchell.blogspot.de/2014/09/ghcid-new-ghci-based...

koloron

10 lat temudiscuss

Since GHC-7.10, the minimal complete definition for a Monad instance has been (>>=) (bind) only. So you can simply move the old definition for "return" into the Applicative instance as "pure" and you're good.

koloron

10 lat temudiscuss

How does Maven compare to Haskell's Stack in your opinion?

koloron

10 lat temudiscuss

Didn't downvote, just FYI: Haskell's Applicative is a superclass of Monad now.

koloron

10 lat temudiscuss

Can you share some links?

koloron

11 lat temudiscuss

My favorite song by her: https://www.youtube.com/watch?v=eAKh26bfkpw

Beautiful usage of a vocoder.

Yes, I know it's OT…

koloron

11 lat temudiscuss

Haskell has a pretty cool new dependency management tool called stack (https://github.com/commercialhaskell/stack).

It's based on the curated package server https://stackage.org which server sets of packages that are tested for compatibility.

koloron

12 lat temudiscuss

How does Haskell compare to Erlang regarding these features?

Submissions

The Automatic Corporation

comments