I remember while learning data structures and implementing them, I landed on http://www.keithschwarz.com/interesting/ http://www.keithschwarz.com/interesting/.

I remember while learning data structures and implementing them, I landed on http://www.keithschwarz.com/interesting/ http://www.keithschwarz.com/interesting/. It was enlightenment for me. By browsing through these examples I learned about good programming practices. Most importantly how commenting your code can help you even when you return after few years to fix something in it.