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I recently took a break from Perl work to study at the Recurse Center. I’m learning Haskell, and it’s been an interesting adventure so far. I’d heard good things about Haskell’s type system and star

Haskell's particular brand of polymorphism is known as parametric polymorphism. Essentially, this means that polymorphic functions must work uniformly for any input type. This turns out to have some i

Using do blocks as an alternative monad syntax was first introduced way back in the Simple input and output chapter. There, we used do to sequence input/output operations, but we hadn't introduced

genvironment: emacs 2.5 , windows10 (chinese / japanese)cabal init… , cabal configure… ,open the Main.hs and press c-c c-l, I get the following message :The Haskell process 'xx' has died. Restar

Interactive commandsAs usual, enabling a new feature in the Haskell mode involves changing some configuration file. In particular, we need to enable the interactive features and also define the ke

Haskell is famous for having a steep learning curve. As a web developer we’re used to clear tutorials that we can understand and complete within an hour or two. Haskell introduces many new concepts no