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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 has pioneered several programming language features such as type classes , which enable type-safe operator ...
The table shows a comparison of functional programming languages which compares various features and designs of different ... Haskell: Yes [40] Default [41] Static ...
A simple example that is often used to demonstrate the syntax of functional languages is the factorial function for non-negative integers, shown in Haskell: factorial :: Integer -> Integer factorial 0 = 1 factorial n = n * factorial ( n - 1 )
As another example, the list of all Fibonacci numbers can be written in the programming language Haskell as: [13] fibs = 0 : 1 : zipWith ( + ) fibs ( tail fibs ) In Haskell syntax, " : " prepends an element to a list, tail returns a list without its first element, and zipWith uses a specified function (in this case addition) to combine ...
Functional programming languages define programs and subroutines as mathematical functions and treat them as first-class. Many so-called functional languages are "impure", containing imperative features. Many functional languages are tied to mathematical calculation tools. Functional languages include:
Combinatory logic is a notation to eliminate the need for quantified variables in mathematical logic.It was introduced by Moses Schönfinkel [1] and Haskell Curry, [2] and has more recently been used in computer science as a theoretical model of computation and also as a basis for the design of functional programming languages.
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:
In computing, Fudgets is a graphical user interface toolkit for the functional programming language Haskell and the X Window System. [1] [2] Fudgets makes it easy to create client–server model applications that communicate via the Internet. Most of the work on Fudgets was done in 1991-1996 by Thomas Hallgren and Magnus Carlsson. [3]