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The <hask>Reader</hask> monad is a bit like <hask>State</hask>, but not as general. It doesn't allow you to permanently change the environment, so that spoils This example comes with a disclaimer. You should never use <hask>Writer</hask> in this way. This example was rea

Before we get too far, I should offer a disclaimer. The Haskell [[monads]] in general and IO specifically. Monads are a purely

...setting up a tray with trayer, and making it all play nicely together. [[#disclaimer|I use this exact configuration]] on everything from a 1024x600 Eee PC to a <span id="disclaimer"></span>

...lelism in Haskell. Try the [[Parallel|Parallel Haskell portal]] for a more general view.'' '''Disclaimer:''' Data Parallel Haskell is very much '''work in progress.''' Some compon

...page shows several examples of how code can be improved. We try to derive general rules from them, though they cannot be applied deterministically and are a If you don't find appropriate functions in the standard library, extract a general function.

...we ensure that the compiler will not omit or reorder its execution? And in general: How we can work with stateful algorithms and side effects in an entirely l A little disclaimer: I should say that I'm not describing here exactly what a monad is (I don't