Содержание: 👉 Handling nullability 👉 Implementing singletons 👉 Data classes 👉 Handling strings 👉 Elvis operator 👉 Destructuring 👉 Properties and backing properties 👉 Default arguments and named parameters 👉 Working with collections 👉 Extension functions 👉 Top-level functions and parameters 👉 let, apply, with, and run keywords