Пройти Kotlin Koans

Hello, world!

Named arguments

Default arguments

Triple-quoted strings

String templates

Nullable types

Nothing type

Lambdas

Data classes

Smart casts

Sealed classes (Изолированные классы)

Rename on import

Extension functions

Comparision

Ranges

For loop

Operators overloading

Invoke

Properties

Lazy property

Delegates examples

Delegates how it works

Introduction

Sort

Filter map

All Any and other predicates

Associate

GroupBy

Partition and destructuring declaration

FlatMap

Max min (collection aggregate operations)

Sum

Fold and reduce

Compound tasks

Sequences

Getting used to new style

Function literals with receiver

String and map builders

The function apply

Html builders

Builders how it works

Builders implementation