haskell

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Will a value that has a type with class constraints actually be a function at run time?

Consider the famous fibs = 0 : 1 : zipWith (+) fibs (tail fibs) Suppose that, to avoid the monomorphism restriction, this is annotated with:[详细]

2023-04-11 01:53 分类：问答
"=~" raise "No instance for (RegexContext Regex [Char] [String])"

OS: MacOSX 10.7.1 GHC and Haskell-platform from brew. GHCi, version 7.0.4: http://www.haskell.org/ghc/:? for help[详细]

2023-04-10 22:13 分类：问答
Replacing a word by synonyms in Haskell

I was going through this plagiarism detector and trying to write a program in Haskell which will read a file and replace some of its words with synonyms. Is there any dictionary available for this pur[详细]

2023-04-10 22:11 分类：问答
runState inside a State Monadic function not working

I am trying to solve the problem 2.8 of \"AI - A Modern Approach\" book which involves a grid of cells and choosing random moves to navigate the grid.[详细]

2023-04-10 21:56 分类：问答
'some' and 'many' functions from the 'Alternative' type class [duplicate]

This question already has answers here: 开发者_Python百科 Haskell - What is Control.Applicative.Alternative good for?[详细]

2023-04-10 20:51 分类：问答
Avoiding duplicated QuickCheck properties

I\'m starting to learn Haskell by doing the 99 Haskell problems.http://www.haskell.org/haskellwiki/H-99:_Ninety-Nine_Haskell_ProblemsI\'d like to write tests for each program/function using quickcheck[详细]

2023-04-10 17:44 分类：问答
Combining two Enumeratees

I\'m trying to wrap my head around the enumerator library and ran into a situation where开发者_如何学Go I want to build a new Enumeratee in terms of two existing Enumeratees. Let\'s say I have the enu[详细]

2023-04-10 17:41 分类：问答
Implementing unify algorithm in haskell

I开发者_运维百科 am trying to implement a unify function with an algorithm that is specified as[详细]

2023-04-10 16:00 分类：问答
Where is parseRoutesNoCheck in Yesod

I started to learn Haskell language and Yesod web framework. When I tried to use \"parseRoutesNoCheck\" for mkYesod, however, the compiler could not match the return type (Resource) of parseRoutesNoCh[详细]

2023-04-10 15:54 分类：问答
Vowel datatype in Haskell, is it possible?

I have written the following code to remove vowels from a sentence: main = print $ unixname \"The House\"[详细]

2023-04-10 15:36 分类：问答