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Summation in Haskell - functional programing


By : twang
Date : October 18 2020, 03:08 PM
Hope that helps In your source file clase4.hs, the character you think is a standard ASCII minus sign in the expression n-1 isn't. Instead, you've probably used some other unicode character, like an "en dash" or something that only looks like a minus sign (perhaps because you've edited the file in something weird like Microsoft Word or copied and pasted the code from some source that was messing with the characters).
Haskell is printing the invalid character as a "?" because, as far as it can tell, your output terminal doesn't support the encoding necessary to display the bad character. (This is a common problem when running Haskell in a Windows environment, though it might happen on other platforms if things were set up strangely.)
code :


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Parallel programing in the functional paradigm


By : ask4mar
Date : March 29 2020, 07:55 AM
like below fixes the issue Map reduce which is likely the most dominant algorithm in use today is functional: http://labs.google.com/papers/mapreduce.html
There is the classic paper on software transactional memory: http://research.microsoft.com/en-us/um/people/simonpj/papers/stm/stm.pdf

Functional programing function


By : user3011269
Date : March 29 2020, 07:55 AM
it helps some times It depends on the language, but generally, there'll be a recursive solution involving traversal of the sets identifying shared elements.
E.g. in Haskell on the native Data.Set type,
code :
union :: Ord a => Set a -> Set a -> Set a
union Tip t2  = t2
union t1 Tip  = t1
union t1 t2 = hedgeUnion (const LT) (const GT) t1 t2

hedgeUnion _     _     t1 Tip
  = t1
hedgeUnion cmplo cmphi Tip (Bin _ x l r)
  = join x (filterGt cmplo l) (filterLt cmphi r)
hedgeUnion cmplo cmphi (Bin _ x l r) t2
  = join x (hedgeUnion cmplo cmpx l (trim cmplo cmpx t2))
           (hedgeUnion cmpx cmphi r (trim cmpx cmphi t2))
  where
    cmpx y  = compare x y
unionBy                 :: (a -> a -> Bool) -> [a] -> [a] -> [a]
unionBy eq xs ys        =  xs ++ foldl (flip (deleteBy eq)) (nubBy eq ys) xs

Is C# approching functional programing?


By : Yuliya Konyukhova
Date : March 29 2020, 07:55 AM
Any of those help Many new features of C# remind me of functional programs such as LINQ. As this makes many operations easier it clutters the language. Is this approach for good or bad? ,
Is this approach for good or bad?

How to get rid of boxing and unboxing in functional programing?


By : JAYESH LODHIYA
Date : March 29 2020, 07:55 AM
like below fixes the issue says that we want to filter out all the odd one in a list. , you can always rewrite the function if you want - this comes to mind:

Module initialization in functional programing


By : ChangosMuertos
Date : March 29 2020, 07:55 AM
it helps some times If the behavior of your program depends on the arguments used on the command line, there is simply no way to hide that fact -- it will have to appear in the types of your program's components. The simplest way is to write
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