What are extension functions? Kotlin’s extension functions provide you with a way of “adding” methods to a class, without having to inherit from that class or use any type of design pattern ...

Functions in Kotlin can be top-level objects, meaning they do not need to be nested within a class. Moreover, Kotlin has other function-related features that support a cleaner, more compact syntax ...

The Kotlin 1.4-M1 release includes a new, more powerful type inference algorithm that is enabled by default, as well as new features and language changes.