Advanced Kotlin: Generics, Type Erasure, and Reflection Explained

[@masoudbadremiran3657]

Best kotlin generic course

[@MrFlavprince]

The best video explaining variance! Very explicit explanations, very informative leaves me with more answers than questions.

[@chinmayakn7199]

Good explanation.👏👏👏 Need more videos like this!!

[@AbdurahmanAdilovic]

one of the best videos on kotlin generics !

[@NATAR160]

Great job. Thanks so much.

[@nicholasferrara8028]

Keep going, would love to see more videos

[@wilsonahanmisi1187]

Love this. Keep up the good work 👏🏾

[@dashaxedit]

Thank you

[@brianmaina7539]

Thanks Ian for this keep up soaring👏👏👏👏

[@LiranBarsisa]

What's the point of "in" and "out" though?
I don't get the use case of using this, instead of just "T" which holds both..

[@AbdurahmanAdilovic]

its just another tool in the toolbox, if you want to limit the output type but you don't care about the input, it is a nice way to do it.

[@yxlxfxf]

You use in/out to specify variance, which is helpful when dealing with sub-types. Simply using "T" means the type is invariant in T.

[@LiranBarsisa]

@@yxlxfxf The point is that you get both worlds without them. They are limiting you.

[@yxlxfxf]

@@LiranBarsisa the point is wrong, I don't think you understand variance. You don't get both worlds, you get neither - invariant means neither covariant nor contravariant

[@LiranBarsisa]

@@yxlxfxf If you don't use "in" and "out", what do you get, then? You can have it as output of functions, and also input of functions.

[@OmbasaMukhwami]

Am a c# developer and I now know