Covariance vs Contravariance in Programming Languages

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Learn about Covariance, Contravariance, Bivariance and Invariance with code examples.

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#Covariance #Contravariance #Bivariance
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This is the best and shortest explanation I've ever seen of these concepts. Most people spend hours on this topic and don't even manage to get the point across.

Hector-bjls
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I watched about 10 videos and yours is the best. Well done!

hitek
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This is a very tricky topic, but now I understand it better thanks to you!

dipper
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This is one of the best explaination, plain and straightforward.

davidpeng
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Sir... That's was a AMAZING explanation

AliciaMedeiros-hr
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I'm a JavaScript/TypeScript student and don't even know what language you are using, but you really helped me understand some confusing concepts. Thanks a lot! ^_^

danielh
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Great video, but have been better if you quickly went into how to define covariant and contravariant generic types.

TheBoxyBear
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Great explanation. Better than the chatGPT one, and light years better than Rebecca's (my comp professor...)!

rockbet
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Good explanation, I like it. Thanks.

arumugamp