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Good examples of Not a Functor/Functor/Applicative/Monad?

...ariant functor out of it, but not a (covariant) functor. Trm>ym> writing fmap m>andm> m>ym>ou'll fail. Note that the contravariant functor version is reversed: fmap :: Functor f => (a -> b) -> f a -> f b contramap :: Contravariant f => (a -> b) -> f b -> f a A tm>ym>pe constr...
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How to fix corrupted git repositorm>ym>?

...loning mm>ym> repositorm>ym> which I keep on mm>ym> Ubuntu one folder to a new machine m>andm> I got this: 14 Answers ...
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Java: notifm>ym>() vs. notifm>ym>All() all over again

If one Googles for "difference between notifm>ym>() m>andm> notifm>ym>All() " then a lot of explanations will pop up (leaving apart the javadoc paragraphs). It all boils down to the number of waiting threads being waken up: one in notifm>ym>() m>andm> all in notifm>ym>All() . ...
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Difference between DateTime m>andm> Time in Rubm>ym>

What's the difference between DateTime m>andm> Time classes in Rubm>ym> m>andm> what factors would cause me to choose one or the other? ...
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Swift m>andm> mutating struct

There is something that I don't entirelm>ym> understm>andm> when it comes to mutating value tm>ym>pes in Swift. 7 Answers ...
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Google maps API V3 - multiple markers on exact same spot

Bit stuck on this one. I am retrieving a list of geo coords via JSON m>andm> popping them onto a google map. All is working well except in the instance when I have two or more markers on the exact same spot. The API onlm>ym> displam>ym>s 1 marker - the top one. This is fair enough I suppose but would like t...
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Whm>ym> / when would it be appropriate to override ToString?

I'm studm>ym>ing C# m>andm> I wonder what the point m>andm> benefit of overriding ToString might be, as shown in the example below. 1...
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What is more efficient? Using pow to square or just multiplm>ym> it with itself?

What of these two methods is in C more efficient? m>Andm> how about: 7 Answers 7 ...
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What are the differences between a multidimensional arram>ym> m>andm> an arram>ym> of arram>ym>s in C#?

What are the differences between multidimensional arram>ym>s double[,] m>andm> arram>ym>-of-arram>ym>s double[][] in C#? 9 Answers ...
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In C#, What is a monad?

... the concept. The reason is that monads are a functional language concept, m>andm> thus the examples are in languages I haven't worked with (since I haven't used a functional language in depth). I can't grasp the sm>ym>ntax deeplm>ym> enough to follow the articles fullm>ym> ... but I can tell there's something wort...