Search results
Results from the WOW.Com Content Network
The pattern matching feature of function arguments in the ML programming language (1973) and its dialect Standard ML (1983) has been carried over to some other functional programming languages that were influenced by them, such as Haskell (1990), Scala (2004) and F# (2005).
It should only contain pages that are Pattern matching programming languages or lists of Pattern matching programming languages, as well as subcategories containing those things (themselves set categories). Topics about Pattern matching programming languages in general should be placed in relevant topic categories.
Haskell features lazy evaluation, lambda expressions, pattern matching, list comprehension, type classes and type polymorphism. It is a purely functional programming language, which means that functions generally have no side effects .
Also, pattern matching in Haskell 98 is strict by default, so the ~ qualifier has to be used to make it lazy. [22] Simulating laziness in eager languages. Java
The second line relies on pattern matching, an important feature of Haskell. Note that parameters of a function are not in parentheses but separated by spaces. When the function's argument is 0 (zero) it will return the integer 1 (one). For all other cases the third line is tried.
In addition to a guard attached to a pattern, pattern guard can refer to the use of pattern matching in the context of a guard. In effect, a match of the pattern is taken to mean pass. This meaning was introduced in a proposal for Haskell by Simon Peyton Jones titled A new view of guards in April 1997 and was used in the implementation of the ...
1 2 3 Case-expressions in Haskell and match-expressions in F# and Haskell allow both switch-case and pattern matching usage. ^ In a Ruby case construct, regular expression matching is among the conditional flow-control alternatives available.
An early version of generalized algebraic data types were described by Augustsson & Petersson (1994) and based on pattern matching in ALF. Generalized algebraic data types were introduced independently by Cheney & Hinze (2003) and prior by Xi, Chen & Chen (2003) as extensions to the algebraic data types of ML and Haskell. [5]