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  2. Haskell - Wikipedia

    en.wikipedia.org/wiki/Haskell

    Haskell (/ ˈ h æ s k əl / [25]) is a general-purpose, statically typed, purely functional programming language with type inference and lazy evaluation. [ 26 ] [ 27 ] Designed for teaching, research, and industrial applications, Haskell pioneered several programming language features such as type classes , which enable type-safe operator ...

  3. Applicative functor - Wikipedia

    en.wikipedia.org/wiki/Applicative_functor

    Applicative functors first appeared as a library feature in Haskell, but have since spread to other languages as well, including Idris, Agda, OCaml, Scala and F#. Glasgow Haskell, Idris, and F# offer language features designed to ease programming with applicative functors. In Haskell, applicative functors are implemented in the Applicative type ...

  4. Corecursion - Wikipedia

    en.wikipedia.org/wiki/Corecursion

    In computer science, corecursion is a type of operation that is dual to recursion.Whereas recursion works analytically, starting on data further from a base case and breaking it down into smaller data and repeating until one reaches a base case, corecursion works synthetically, starting from a base case and building it up, iteratively producing data further removed from a base case.

  5. Fold (higher-order function) - Wikipedia

    en.wikipedia.org/wiki/Fold_(higher-order_function)

    In Haskell this is the foldl' (note the apostrophe, pronounced 'prime') function in the Data.List library (one needs to be aware of the fact though that forcing a value built with a lazy data constructor won't force its constituents automatically by itself). Combined with tail recursion, such folds approach the efficiency of loops, ensuring ...

  6. Functor (functional programming) - Wikipedia

    en.wikipedia.org/wiki/Functor_(functional...

    In functional programming, a functor is a design pattern inspired by the definition from category theory that allows one to apply a function to values inside a generic type without changing the structure of the generic type. In Haskell this idea can be captured in a type class:

  7. Mutual recursion - Wikipedia

    en.wikipedia.org/wiki/Mutual_recursion

    Mutual recursion is very common in functional programming, and is often used for programs written in LISP, Scheme, ML, and similar programming languages. For example, Abelson and Sussman describe how a meta-circular evaluator can be used to implement LISP with an eval-apply cycle. [ 7 ]

  8. Currying - Wikipedia

    en.wikipedia.org/wiki/Currying

    The "Curry" in "Currying" is a reference to logician Haskell Curry, who used the concept extensively, but Moses Schönfinkel had the idea six years before Curry. [10] The alternative name "Schönfinkelisation" has been proposed. [15]

  9. Haskell features - Wikipedia

    en.wikipedia.org/wiki/Haskell_features

    Concurrent Haskell is an extension to Haskell that supports threads and synchronization. [7] GHC's implementation of Concurrent Haskell is based on multiplexing lightweight Haskell threads onto a few heavyweight operating system (OS) threads, [8] so that Concurrent Haskell programs run in parallel via symmetric multiprocessing. The runtime can ...