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Functors show up everywhere in our day-to-day programming. They're so common, we take them for granted – especially in typed functional programming. Besides being common, they're incredibly useful for code reuse. However, functors have some lesser known variants: profunctors, bifunctors, contravariant functors, and so on. Guess what? They're amazingly useful, especially combined with other abstractions in the functional programming toolkit! In this talk, you'll discover the many species of functors and see how they can help you with tasks such as serialisation, stream processing, and more.

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