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Re:A monad is a monoid in the category of endofunctors, what... by k__ on Sunday February 10, 2019 @10:26AM (#19128106)
Same here.

Someone said "Functors are objects with a map method, monads are objects with a flatMap method" and then explained some different type of objects that have these methods and how the work in that specific cases.

After 2-4 cases I saw the principles and rules behind them.

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