The Observer Design Pattern

In this video, the Observer software design pattern is explained.
Observer: Inform registered observers about changes.
This is part of the lecture "Design Patterns" at Graz University of Technology (Austria).
Target Audience: Students, Computer Scientists, Software Developers, Software Architects
TU Graz Website: www.tugraz.at/
TeachCenter Moodle Course: tc.tugraz.at/main/course/view...
0:00 Introduction
0:10 Context and Problem
1:03 Forces and Challenges
3:11 Structure
5:50 Solution
6:21 Consequences
8:12 Example
9:43 Closing Words