Map (higher-order function): Difference between revisions

Revision as of 22:11, 26 March 2008

Revision as of 22:18, 26 March 2008

Line 29:

* <code>fmap id = id -- identity</code>

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

==Mapping in .NET Procedural Languages==

The map function in .NET Procedural languages like C# or VB.NET (as of C# 2.0 and VB 8.0) is supported through the [http://msdn2.microsoft.com/en-us/library/73fe8cwf.aspx ConvertAll method] of the generic list type,

[http://msdn2.microsoft.com/en-us/library/6sh2ey19.aspx

System.Collections.Generic.List<T>].

<source lang="csharp">

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

var foo = Values.ConvertAll((d) => { return d*d; }) ;

// foo is of type System.Collections.Generic.List<Int32>

</source>

==References==