LYCOS RETRIEVER 
Functional Programming: Haskell
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Currying functions, an operation named in honour of Haskell B. Curry is ... often found in functional programming. Closures are a related concept. Environment capture, variables from any of the scopes in which the function is being defined, is a related idea. Lazy evaluation is also common.
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The PFP library is a collection of modules for Haskell that facilitates probabilistic functional programming, that is, programming with stochastic values. The probabilistic functional programming approach is based on a data type for representing distributions. A distribution represent the outcome of a probabilistic event as a collection of all possible values, tagged with their likelihood.
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The pure functional programming language Haskell implements them using monads, derived from category theory. Monads are powerful and offer an intuitive way to model state (and other side effects such as IO) in an imperative manner without losing purity. While existing monads are easy to use, many find it difficult to understand how to define new monads (which is sometimes needed for certain types of libraries).[16]
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FC++ is a software library which aims to facilitate the functional programming paradigm, as well as other declarative paradigms, within the C++ programming language. It provides Haskell-like functoids, lazy lists, currying, lambda, monads and more!
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