Tagged Questions
7
votes
1answer
160 views
Better to use error monad with validation in your monadic functions, or implement your own monad with validation directly in your bind?
I'm wondering what's better design wise for usability/maintainability, and what's better as far as fitting with the community.
Given the data model:
type Name = String
data Amount = Out | Some | ...
4
votes
1answer
189 views
What monad is the opposite of the error monad in haskell
In the error monad, the first failure halts any execution further just carrying the fault through any following binds.
What monad halts on success only carrying forward successes, and basically ...
30
votes
5answers
2k views
Critique of the IO monad being viewed as a state monad operating on the world
The IO monad in Haskell is often explained as a state monad where the state is the world. So a value of type IO a monad is viewed as something like worldState -> (a, worldState).
Some time ago I ...
16
votes
2answers
490 views
Different ways to see a monad
While learning Haskell I have faced a lot of tutorials trying to explain what are monads and why monads are important in Haskell. Each of them used analogies so it would be easier to catch the ...
7
votes
6answers
759 views
As a practitioner, why should I care about Haskell? What is a monad and why do I need it?
I just do not get what problem they solve.
