The annotation aspect of Rap Genius always gets me dreaming of a site with "completely commented code" through crowd-sourcing. Every single line/block of code o

The annotation aspect of Rap Genius always gets me dreaming of a site with "completely commented code" through crowd-sourcing. Every single line/block of code of various open source projects explained thoroughly. When I started picking up programming, I learned by copy-pasting code bits from everywhere, and reverse-engineering it to fit my learning projects. If, along with that, I could have gotten thorough explanations for each block of code I copied, I feel I'd be much more proficient in understanding the "why", not just the "how" of programming.