View Source: Haskell - Waikato Linux Users Group

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[Haskell | http://www.haskell.org] is a pure functional ProgrammingLanguage that employs LazyEvaluation and supports generic or PolymorphicTypes.

It has some cool concepts, like the dot operator. If you remember your calculus, it used the . for functional composition — and so does [Haskell]! This allows you to do something similar to the pipe operator used in [Shell] scripting.

!!! Example

<verbatim>
-- sieve: prints the number of prime numbers between 2 and 100000

sieve :: [Int] -> [Int]
sieve [] = []
sieve (h:t) = h : sieve [x| x <- t, x `mod` h /= 0]

main = (print . length . sieve) [2..100000]
</verbatim>

!!! Implementations

[HUGS | http://haskell.org/hugs]::
    __H__askell __U__sers' __G__ofer __S__ystem.
    An interpreter that's good for playing around learning [Haskell].
    (“Gofer” was a subset of [Haskell], but HUGS now implements full [Haskell].)

[GHC | http://www.haskell.org/ghc/]::
    __G__lasglow __H__askell __C__ompiler.
    A big, optimising compiler for Haskell.

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Part of CategoryProgrammingLanguages, CategoryFunctionalProgrammingLanguages

11 pages link to Haskell:

Last edited on Sunday, December 13, 2009 10:49:35 pm by "FirstnameLastname"

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