I have learned from a lot of commercial code. It doesn't mean I can't also write "free" code. I find most things in all code to be generic and obvious. The sa

I have learned from a lot of commercial code. It doesn't mean I can't also write "free" code. I find most things in all code to be generic and obvious. The same functions are used by lots of other software with just different names that there's nothing novel. After you've learned to classify lots of functions with big O notation, you will end up writing things in an obvious way for a base-level optimization that fits naturally.