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I had the thought—while browsing through some old code—that the code I used to implement futures in C# would be useful for doing things lazily, if you just moved the evaluation phase to when the value was actually demanded… this started me off thinking about how to implement a proper lazily-evaluated list in C#. A [...]

Suppose we have a functor. Let’s call it “My Functor”, because that’s a nice friendly name. I’ll call it for short. Now, a functor is—according to higher sources—something which takes any type to a type . Let’s see how we can accomplish that with our functor, using Haskell code: data MyFunctor a = Construct a [...]