[faizshah]

This gave me a great idea. There should be a website with a bunch of programming challenges (e.g like making a Todo list app or write a data structure in an hour) where you can share your code and workflow. You could then view a bunch of other peoples workflows, code, and post mortem notes and discuss how to improve each others workflows. Anybody know of a site like this?

[recondite]

Project Euler has something similar.

After solving each challenge, you're given access to the message board for that problem where people post their code and discuss how they solved it. The problems tend to become more focused on math implementations than programming after a while though, so this may not be the best example for you.

[amckenna]

Yeah http://www.reddit.com/r/dailyprogrammer has challenges like this and in the comments people share their solutions. It's a great way to learn a new language and find out some interesting tricks.

[lmcnish14]

Exercism.io