Practice programming

https://jasonrudolph.com/blog/2011/08/09/programming-achievements-how-to-level-up-as-a-developer/

Puzzles

• http://codekata.pragprog.com
• Project Euler
• http://programmingpraxis.com/
• http://www.rubyquiz.com/
• http://www.pythonchallenge.com/
• http://www.gowrikumar.com/c/index.html
• http://rosettacode.org/
• https://sites.google.com/site/prologsite/prolog-problems
• Regex Golf

Competitions

• http://topcoder.com
• http://vimgolf.com/
• http://puzzlenode.com/
• http://codebrawl.com/
• http://railsrumble.com/ (September)
• http://www.codewa.rs/

Problems

• Write a program to do the pop count of a byte
• Write a program to check a string for duplicate characters