Reactive programming is ill-defined and over-hyped, so let's talk about types and math instead (plus some not-very-subtle in-jokes about Microsoft).
An enumerator is basically a getter with the ability to fail and / or terminate. It might also return a promise rather than a value. An enumerable is a getter that returns an enumerator. We can express all this very cleanly in generic types. And if we take the category-theoretic dual of these types we get the observer and observable types.
Reactive programming is ill-defined and over-hyped, so let's talk about types and math instead (plus some not-very-subtle in-jokes about Microsoft).
An enumerator is basically a getter with the ability to fail and / or terminate. It might also return a promise rather than a value. An enumerable is a getter that returns an enumerator. We can express all this very cleanly in generic types. And if we take the category-theoretic dual of these types we get the observer and observable types.
So who needs reactive? ;-)