Natural Order Development

In preparing for a presentation on Behavior Driven Development I needed some examples. So I started searching the Internet for exemplar problems to demonstrate various techniques. In the process I instantly got hooked on the idea of regularly grabbing some programming challenge to hone my programming skills. The goal is to find lists of small challenges that should only take a few hours to solve but for which I can apply rigorous standards such as BDD, Continuous Integration, Design By Contract, and other best practices.

It would be good if some example answers were provided with explainations and possibly discussions of the solutions.

Tutorials

Python

• http://www.upriss.org.uk/python/PythonCourse.html

Java

Security

• http://www.hackthissite.org (Web security challenges with tutorials to teach web vunerabilities.)

Programming Challenges

Any Language

• Geek Challenges http://osix.net/modules/geek/ (random coding challenges to solve in any way you wish.)
• How to Think Like a Computer Scientist http://openbookproject.net/thinkCSpy/
• Project Euler http://projecteuler.net/ (Once you provide the correct answer you are granted access to discuss other solutions.)

Python

• Bembry.org python exercises http://www.bembry.org/technology/python/exercises/
• Python Challenge http://www.pythonchallenge.com/ (this is actually a game but it teaches Python in the process.)
• ACM programming challenges http://icpc.baylor.edu/past/PastProblems.html
• UC Davis Python Challenges http://cse.ucdavis.edu/~chaos/courses/nlp/Software/PythonProgramming.html (Some python problems focusing on science / math.)

Java

Security