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The previous code is syntactic sugar for the following code written using lambda expressions: var ns = Enumerable. Range ... Erlang L = lists: ... Haskell x * 2 | x ...
In C++, the std::map class is templated which allows the data types of keys and values to be different for different map instances. For a given instance of the map class the keys must be of the same base type. The same must be true for all of the values.
Haskell: Application No No Yes No Yes No Lazy evaluation Yes 2010, Haskell 2010 [29] Haxe: Application, general, web Yes Yes Yes No Yes Yes No HyperTalk: Application, RAD, general Yes No No Yes No Yes Weakly typed Unknown Io: Application, host-driven scripting Yes Yes No No No No No IPL: General No No Yes No No No Unknown ISLISP: General ...
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 .
The lambda calculus, developed in the 1930s by Alonzo Church, is a formal system of computation built from function application. In 1937 Alan Turing proved that the lambda calculus and Turing machines are equivalent models of computation, [37] showing that the lambda calculus is Turing complete. Lambda calculus forms the basis of all functional ...
Evaluating this lambda expression is similar [a] to constructing a new instance of an anonymous class that implements Lazy<Integer> with an eval method returning 1. Each iteration of the loop links a to a new object created by evaluating the lambda expression inside the loop.
This is a comparison of the features of the type systems and type checking of multiple programming languages.. Brief definitions A nominal type system means that the language decides whether types are compatible and/or equivalent based on explicit declarations and names.