Going through your previous implementation gives one sure sign of whether you are improving. When on a steep learning curve, its very easy to spot bad implement

Going through your previous implementation gives one sure sign of whether you are improving. When on a steep learning curve, its very easy to spot bad implementation. It's akin to getting your code reviewed by someone with additional year of experience. Although, some of the mistakes you spot may be attributed to perhaps your enhanced domain knowledge but you will be able to distinguish between the two. Additionally, to remain on the steep learning curve, I think its imperative to expose yourself to well written code and solving different set of problems.