A functional programming language

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3
votes
1answer
80 views

How to manage the state in a GUI app with Haskell

I am using wxHaskell to create a simple GUI that has typical components like Buttons, Panels, etc. When some of these components perform an action (like callback), the generic status of the ...
13
votes
0answers
287 views

Haskell build and artifact environment similar to Maven

I used to be a Java developer for a long time, but recently, I joined a Haskell team. In the java world, if you have a large project, with several teams working on it, a common approach is to use an ...
4
votes
0answers
115 views

Why do Haskell functors only have derived types in their target category?

In Haskell, the Functor typeclass functor is defined as follows (see e.g. Haskell wiki): class Functor (f :: * -> *) where fmap :: (a -> b) -> f a -> f b As far as I understand ...
3
votes
0answers
101 views

Using Haskell type classes to enforce commutativity

I want to define a type class for geometric objects that can be intersected together: class Intersect a b c | a b -> c where intersect :: a -> b -> c -- Language extensions: ...
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vote
0answers
86 views

Is there a way to force evaluation in GHCi?

I'm messing around with binary trees, and I'm trying to get a very rough benchmark of a few functions using GHCi. I only want to get the time required to evaluate the test functions; not how long it ...
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votes
0answers
76 views

Database-like structure in memory

I need a database-like structure that will wrap this: data MsgPackDB = MsgPackDB { dim :: !(V.Vector Int) , rows :: !([DBRow]) } data DBRow = ...