Android Development with Kotlin

2.

Kotlin Language Fundamentals

2.1.

Basic Syntax and Idioms

2.1.1.

Variables and Constants

2.1.1.1.

2.1.1.2.

Immutable vs. Mutable Variables

2.1.1.3.

2.1.2.

Basic Data Types

2.1.2.1.

2.1.2.1.1.

2.1.2.1.2.

2.1.2.1.3.

2.1.2.1.4.

2.1.2.2.

2.1.2.3.

Char and String

2.1.2.4.

2.1.2.5.

2.1.3.

2.1.3.1.

Function Declaration and Parameters

2.1.3.2.

Default and Named Arguments

2.1.3.3.

Single-Expression Functions

2.1.3.4.

Local Functions

2.1.4.

Lambda Expressions

2.1.4.1.

Lambda Syntax and Usage

2.1.4.2.

Trailing Lambda Syntax

2.2.

2.2.1.

Nullable vs. Non-Nullable Types

2.2.1.1.

Declaring Nullable Types

2.2.1.2.

Safe Type Casting

2.2.2.

Safe Calls (?.)

2.2.2.1.

Chaining Safe Calls

2.2.3.

The Elvis Operator (?:)

2.2.3.1.

Providing Default Values

2.2.4.

Not-Null Assertion (!!)

2.2.4.1.

Risks and Best Practices

2.2.5.

Let Function for Null Checks

2.3.

2.3.1.

Conditional Expressions

2.3.1.1.

if as an Expression

2.3.1.2.

when as a Switch Replacement

2.3.1.3.

when with Ranges and Collections

2.3.2.

2.3.2.1.

2.3.2.1.1.

Iterating Over Collections

2.3.2.1.2.

Loop Ranges and Steps

2.3.2.2.

while and do-while Loops

2.3.3.

2.3.3.1.

Range Operators

2.3.3.2.

DownTo and Step

2.3.3.3.

2.3.4.

Break and Continue

2.4.

Object-Oriented Programming in Kotlin

2.4.1.

Classes and Objects

2.4.1.1.

Class Declaration

2.4.1.2.

Object Instantiation

2.4.1.3.

2.4.2.

Properties and Fields

2.4.2.1.

Property Declaration

2.4.2.2.

Getters and Setters

2.4.2.3.

2.4.2.4.

Late-Initialized Properties

2.4.3.

Constructors and Initialization

2.4.3.1.

Primary Constructors

2.4.3.2.

Secondary Constructors

2.4.3.3.

2.4.3.4.

Constructor Parameters vs. Properties

2.4.4.

Inheritance and Polymorphism

2.4.4.1.

Open and Final Classes

2.4.4.2.

Method Overriding

2.4.4.3.

Calling Superclass Implementation

2.4.5.

Abstract Classes and Interfaces

2.4.5.1.

Defining Abstract Members

2.4.5.2.

Implementing Interfaces

2.4.5.3.

Interface Default Implementations

2.4.6.

2.4.6.1.

Auto-generated Methods

2.4.6.1.1.

2.4.6.1.2.

2.4.6.1.3.

2.4.6.1.4.

2.4.6.1.5.

2.4.6.2.

2.4.6.3.

Destructuring Declarations

2.4.7.

2.4.7.1.

Restricted Class Hierarchies

2.4.7.2.

Use in when Expressions

2.4.8.

Objects and Companion Objects

2.4.8.1.

Singleton Pattern

2.4.8.2.

Object Expressions

2.4.8.3.

Companion Objects

2.4.8.4.

Static Members Alternative

2.4.9.

2.4.9.1.

Basic Enum Declaration

2.4.9.2.

Enum with Properties and Methods

2.4.10.

Nested and Inner Classes

2.4.10.1.

2.4.10.2.

2.5.

Functional Programming Concepts

2.5.1.

Higher-Order Functions

2.5.1.1.

Passing Functions as Parameters

2.5.1.2.

Returning Functions

2.5.2.

Lambda Expressions Advanced

2.5.2.1.

2.5.2.2.

2.5.3.

Collection Processing APIs

2.5.3.1.

2.5.3.2.

2.5.3.3.

2.5.3.4.

reduce and fold

2.5.3.5.

groupBy and partition

2.5.3.6.

2.5.3.7.

2.5.3.8.

sortedBy and sortedWith

2.6.

Advanced Kotlin Features

2.6.1.

Extension Functions

2.6.1.1.

Adding Methods to Existing Classes

2.6.1.2.

Extension Properties

2.6.1.3.

Member vs. Extension Functions

2.6.2.

Scope Functions

2.6.2.1.

2.6.2.2.

2.6.2.3.

2.6.2.4.

2.6.2.5.

2.6.2.6.

Choosing the Right Scope Function

2.6.3.

Infix Functions

2.6.4.

Operator Overloading

2.6.5.

Destructuring Declarations

2.6.6.

2.6.7.

2.6.7.1.

Generic Classes and Functions

2.6.7.2.

Type Constraints

2.6.7.3.

Variance (in, out)

2.6.8.

Coroutines Introduction

2.6.8.1.

Suspending Functions

2.6.8.2.

Coroutine Builders

2.6.8.2.1.

2.6.8.2.2.

2.6.8.3.

Coroutine Context and Scope

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