Abstractions help make your code last much longer… when done right! In practice, it takes some experience to leverage it.

We'll start by defining "abstraction", and seeing why it's so useful, with concrete examples.

Then, we'll see how Kotlin unique features, from extensions, lambdas and coroutines, to expect and actual, can all be used to simplify code to a point no other programming language ever reached, with the goal of inspiring you for your apps and libraries in the future.