This site has been the best programming education site I've encountered in terms of real, pragmatic concepts taught. My favorite is the concept of making invali

This site has been the best programming education site I've encountered in terms of real, pragmatic concepts taught. My favorite is the concept of making invalid states unrepresentable[1] which I try to apply now regardless of language, though some make it easier than others. [1] https://fsharpforfunandprofit.com/posts/designing-with-types-making-illegal-states-unrepresentable/ https://fsharpforfunandprofit.com/posts/designing-with-types...