KotlinConf 2018 - Exploring the Kotlin Type Hierarchy from Top to Bottom by Nat Pryce

This is an awesome talk! Although I was already familiar with the basic type hierarchy of Kotlin, the stuff on generics variance was new to me.

I love the type system of Kotlin its so refreshing to come to from Java

Great talk. I initially found these concepts hard to understand before watching this videos. It’s probably one of reason I have avoided Kotlin as a language. But, this video was great. I actually have a better understanding of the type system. Great explanation by the speaker.

I had difficulties with Kotlin reflection. I had method receiving a parameter of type Class

Great explanation.

All the examples of juice in the generics part, especially for explaining the "in" variance, is kind off... so to say.
The example "if I have a fruit juicer, I can put inside an orange and still works", still working even without specifying the "in" for the contravariance