I created several programming languages a few years ago, thinking "I could do this better" (than the languages I was using). Turns out it was harder than I thou

I created several programming languages a few years ago, thinking "I could do this better" (than the languages I was using). Turns out it was harder than I thought, but I learned a lot about how software works. It remains by far the best thing I've done to advance my skills. Some time after that, the Julia language came into existence (http://julialang.org/ http://julialang.org/) which is pretty much everything I wanted out of a language.