And what I've learned is, programming when you're tired, you write crap and you throw it all away the next day. And 20 years ago I would program although I was getting a strong feeling that this isn't right—there's something wrong with this code. I have noticed over the years, the really good code I would write was when I'm in complete flow—just totally unaware of time: not even really thinking about the program, just sitting there in a relaxed state just typing this stuff and watching it come out on the screen as I type it in. That code's going to be OK. The stuff where you can't concentrate
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