Now *that’s* what I call a title: “Contravariance is the Dual of Covariance | Observable is the Dual of Iterable” scaladays.org/#schedule/Cont…
Mar 26, 2014 · 6:37 PM UTC
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@stilkov I already knew about the later, but the former is an interesting twist. Hmm..
@stilkov I'm sure @headinthebox can prove the former given the later and vice verse.