Comparison of programming languages (associative array): Difference between revisions

Revision as of 21:22, 26 July 2020

Revision as of 21:30, 26 July 2020

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</syntaxhighlight>

=== [[Haskell (programming language)|Haskell]] ===

The [[Haskell (programming language's)|Haskell]] reportprogramming onlylanguage provides only one kind of associative container: – a list of pairs:

<syntaxhighlight lang="Haskell">

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Just "555-1212"

Note that the lookup function returns a "Maybe" value, which is "Nothing" if not found, or "Just ''result{{'' "}} when found.

[[Glasgow Haskell Compiler|GHC]], the most commonly used implementation of Haskell, provides two more types of associative containers. Other implementations might also provide these.

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Just "555-1212"

Lists of pairs and functional maps both provide a purely functional interface, which is more idiomatic in Haskell. In contrast, hash tables provide an imperative interface in the [[Monad_(functional_programming)#IO_monad|IO monad]].

=== [[Java (programming language)|Java]] ===