Interfaces in Different Languages

C

C++

C#

http://msdn.microsoft.com/en-us/library/ms173156.aspx http://msdn.microsoft.com/en-us/library/87d83y5b(v=vs.80).aspx http://blogs.msdn.com/b/curth/archive/2008/11/15/c-dynamic-and-multiple-dispatch.aspx

Eiffel

Haskell

Java

http://en.wikipedia.org/wiki/Interface_(Java)

Objective C

https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/ObjectiveC/Chapters/ocProtocols.html

Perl

PHP

http://php.net/manual/en/language.oop5.interfaces.php

Python

See /understanding_python/interfaces

Ruby

Self

Smalltalk

http://www.smalltalk.org/versions/ANSIStandardSmalltalk.html http://www.cs.virginia.edu/~evans/cs655/readings/smalltalk.html