Map (higher-order function): Difference between revisions

Revision as of 18:12, 1 July 2008

Revision as of 22:56, 8 July 2008

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* <code>fmap (f . g) = fmap f . fmap g -- composition</code>

==Mapping in .NET procedural languages==

The map function in .NET procedural languages likesuch C# or VB.NET (as of C# 2.0 and VB 8.0{{Fact|date=June 2008}}) NET is supported through the <code>Select</code> extension method. Here's an example that combines the use of selectSelect() with the use of [[anonymous functionsmethods]], support for which was added to C# in version 3.0 (November 2007).

<source lang="csharp">

var valuesintArray = new System.Collections.Generic.List<int>()[] { 7, 13, 4, 9, 3 };

var foosquaredInts = valuesintArray.Select(di => di * di);

</source>