I\'m a beginner with Haskell and am having trouble figuring out some code.What do I need to do to get the types right on this IO section of my code?
I have following problem. I have value of type (forall r. MyType r) and I need ParsecT s u m (forall r. MyType r). Is it possible to do it wi开发者_运维知识库thout suppling additional data structures?
I\'ve had the IO monad described to me as a State monad where 开发者_JAVA百科the state is \"the real world\". The proponents of this approach to IO argue that this makes IO operations pure, as in refe
I need to write a state monad that can also support error handling. I was thinking of using the Either monad for this purpose because it can also provide details about what caused the error. I found a
Please bear with me as I am very new to functional programming and Haskell.I am attempting to write a function in Haskell that takes a list of Integers, prints the head of said list, and then returns
Consider the following code I wrote: import Control.Monad increasing :: Integer -> [Integer] increasing n
As i understand Haskell does not have a global state, so is there any way to write a function f that will return f(n - 1) + 1, where n is a number of function call and f(1) = 0.
I\'m a newbie, and the monads get me totally confused. Given a list of filenames i\'d like to know whether all the files exist.
How can exceptions be used in Haskell without going through IO? I have the following code for inserting an element in a binary search tree with minimum comparisons and no copying when the element is
Haskell is a pure functional programming language. My 开发者_Go百科question is: What are the advantages and disadvantages of using Haskell to solve problems involving lots of state, for example GUI p
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