Why free monads matter
Interpreters Good programmers decompose data from the interpreter that processes that data. Compilers exemplify this approach, where they will typically represent the source code as an abstract syntax tree, and then pass that tree to one of many possible interpreters. We benefit from decoupling the interpreter and the syntax tree, because then we can interpret the syntax tree in multiple ways. For
Wadler: Monads
Monads, Arrows, and Idioms Philip Wadler The arrow calculus Sam Lindley, Philip Wadler, and Jeremy Yalloop, Journal of Functional Programming 20(1):51&em;69, 2010. We introduce the arrow calculus, a metalanguage for manipulating Hughes’s arrows with close relations both to Moggi’s metalanguage for monads and to Paterson’s arrow notation. Arrows are classically defined by extending lambda calculus
Haskell/Understanding monads - Wikibooks, open books for an open world
There is a certain mystique about monads, and even about the word "monad" itself. While one of our goals of this set of chapters is removing the shroud of mystery that is often wrapped around them, it is not difficult to understand how it comes about. Monads are very useful in Haskell, but the concept is often difficult to grasp at first. Since monads have so many applications, people often explai
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Monads in Chains - Ivan Cukic - Meeting C++ 2014
