Concatenative programming in Haskell's Arrows
On Sunday, I was reading about arrows in Haskell, and I noticed that these diagrams of the primitive arrow functions looked rather like diagrams of data flow in concatenative (stack-based) languages. This suggested that they might be related, or transformable. (IRC log of the early discussion) I have now found that simple concatenative code is quite easily expressed with arrows, but there are appa
Playing with monad transformers
Yesterday someone posted a link to a great monad transformers tutorial. It's incredible. I think I finally start to understand (or at least being able to use) it. As part of testing my fresh knowledge I've written a simple virtual machine for a Forth-like language. Code (as usual - Literate Haskell, so you can just put it into .lhs file and run it) below. Enjoy! > module Main where > > import Cont
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