Functional programming, APL and UNIX pipes

Re:Functional programming, APL and UNIX pipes by yummyfajitas on Sunday May 23, 2010 @06:51PM (#1373239)

Haskell does. Roughly the author's example using monads:

   [[10..20], [50..100]] >>= id >>= classify

The only thing you can't directly do with monads is the fold, since the fold breaks you out of the monad. Also, you could use arrows:

   myCounter = ( concat >>> (map classify) >>> (foldr getCounts (0,0,0)) )

Then myCounter [ [10..20], [50..60]] is the function you want.

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Re:Functional programming, APL and UNIX pipes by yummyfajitas on Monday May 24, 2010 @10:32AM (#1374702)

Actually, just realized you can do everything with monads.

    (return [[10..20], [50..100]] >>= concat >>= classify >>= foldr getCount (0,0,0))

Just use the identity monad rather than the list monad.

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