Android Programming with Kotlin for Professionals: guide to kotlin programming notes for Professionals step by step

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Chapter 1: Getting started with Kotlin
Section 1 1: Hello World
Section 1 2: Hello World using a Companion Object
Section 1 3: Hello World using an Object Declaration
Section 1 4: Main methods using varargs
Section 1 5: Compile and Run Kotlin Code in Command Line
Section 1 6: Reading input from Command Line
Chapter 2: Basics of Kotlin
Section 2 1: Basic examples
Chapter 3: Strings
Section 3 1: String Equality
Section 3 2: String Literals
Section 3 3: Elements of String
Section 3 4: String Templates
Chapter 4: Arrays
Section 4 1: Generic Arrays
Section 4 2: Arrays of Primitives
Section 4 3: Create an array
Section 4 4: Create an array using a closure
Section 4 5: Create an uninitialized array
Section 4 6: Extensions
Section 4 7: Iterate Array
Chapter 5: Collections
Section 5 1: Using list
Section 5 2: Using map
Section 5 3: Using set
Chapter 6: Enum
Section 6 1: Initialization
Section 6 2: Functions and Properties in enums
Section 6 3: Simple enum
Section 6 4: Mutability
Chapter 7: Functions
Section 7 1: Function References
Section 7 2: Basic Functions
Section 7 3: Inline Functions
Section 7 4: Lambda Functions
Section 7 5: Operator functions
Section 7 6: Functions Taking Other Functions
Section 7 7: Shorthand Functions
Chapter 8: Vararg Parameters in Functions
Section 8 1: Basics: Using the vararg keyword
Section 8 2: Spread Operator: Passing arrays into vararg functions
Chapter 9: Conditional Statements
Section 9 1: When-statement argument matching
Section 9 2: When-statement as expression
Section 9 3: Standard if-statement
Section 9 4: If-statement as an expression
Section 9 5: When-statement instead of if-else-if chains
Section 9 6: When-statement with enums
Chapter 10: Loops in Kotlin
Section 10 1: Looping over iterables
Section 10 2: Repeat an action x times
Section 10 3: Break and continue
Section 10 4: Iterating over a Map in kotlin
Section 10 5: Recursion
Section 10 6: While Loops
Section 10 7: Functional constructs for iteration
Chapter 11: Ranges
Section 11 1: Integral Type Ranges
Section 11 2: downTo() function
Section 11 3: step() function
Section 11 4: until function
Chapter 12: Regex
Section 12 1: Idioms for Regex Matching in When Expression
Section 12 2: Introduction to regular expressions in Kotlin
Chapter 13: Basic Lambdas
Section 13 1: Lambda as parameter to filter function
Section 13 2: Lambda for benchmarking a function call
Section 13 3: Lambda passed as a variable
Chapter 14: Null Safety
Section 14 1: Smart casts
Section 14 2: Assertion
Section 14 3: Eliminate nulls from an Iterable and array
Section 14 4: Null Coalescing / Elvis Operator
Section 14 5: Nullable and Non-Nullable types
Section 14 6: Elvis Operator (?:)
Section 14 7: Safe call operator
Chapter 15: Class Delegation
Section 15 1: Delegate a method to another class
Chapter 16: Class Inheritance
Section 16 1: Basics: the 'open' keyword
Section 16 2: Inheriting fields from a class
Section 16 3: Inheriting methods from a class
Section 16 4: Overriding properties and methods
Chapter 17: Visibility Modifiers
Section 17 1: Code Sample
Chapter 18: Generics
Section 18 1: Declaration-site variance
Section 18 2: Use-site variance
Chapter 19: Interfaces
Section 19 1: Interface with default implementations
Section 19 2: Properties in Interfaces
Section 19 3: super keyword
Section 19 4: Basic Interface
Section 19 5: Conflicts when Implementing Multiple Interfaces with Default Implementations
Chapter 20: Singleton objects
Section 20 1: Use as replacement of static methods/fields of java
Section 20 2: Use as a singleton
Chapter 21: coroutines
Section 21 1: Simple coroutine which delay's 1 second but not blocks
Chapter 22: Annotations
Section 22 1: Meta-annotations
Section 22 2: Declaring an annotation
Chapter 23: Type aliases
Section 23 1: Function type
Section 23 2: Generic type
Chapter 24: Type-Safe Builders
Section 24 1: Type-safe tree structure builder
Chapter 25: Delegated properties
Section 25 1: Observable properties
Section 25 2: Custom delegation
Section 25 3: Lazy initialization
Section 25 4: Map-backed properties
Section 25 5: Delegate Can be used as a layer to reduce boilerplate
Chapter 26: Reflection
Section 26 1: Referencing a class
Section 26 2: Inter-operating with Java reflection
Section 26 3: Referencing a function
Section 26 4: Getting values of all properties of a class
Section 26 5: Setting values of all properties of a class
Chapter 27: Extension Methods
Section 27 1: Potential Pitfall: Extensions are Resolved Statically
Section 27 2: Top-Level Extensions
Section 27 3: Lazy extension property workaround
Section 27 4: Sample extending Java 7+ Path class
Section 27 5: Sample extending long to render a human readable string
Section 27 6: Sample extending Java 8 Temporal classes to render an ISO formatted string
Section 27 7: Using extension functions to improve readability
Section 27 8: Extension functions to Companion Objects (appearance of Static functions)
Section 27 9: Extensions for easier reference View from code
Chapter 28: DSL Building
Section 28 1: Infix approach to build DSL
Section 28 2: Using operators with lambdas
Section 28 3: Overriding invoke method to build DSL
Section 28 4: Using extensions with lambdas
Chapter 29: Idioms
Section 29 1: Serializable and serialVersionUid in Kotlin
Section 29 2: Delegate to a class without providing it in the public constructor
Section 29 3: Use let or also to simplify working with nullable objects
Section 29 4: Use apply to initialize objects or to achieve method chaining
Section 29 5: Fluent methods in Kotlin
Section 29 6: Filtering a list
Section 29 7: Creating DTOs (POJOs/POCOs)
Chapter 30: RecyclerView in Kotlin
Section 30 1: Main class and Adapter
Chapter 31: logging in kotlin
Section 31 1: kotlin logging
Chapter 32: Exceptions
Section 32 1: Catching exception with try-catch-finally
Chapter 33: JUnit
Section 33 1: Rules
Chapter 34: Kotlin Android Extensions
Section 34 1: Using Views
Section 34 2: Configuration
Section 34 3: Painful listener for getting notice, when the view is completely drawn now is so simple and awesome with Kotlin's extension
Section 34 4: Product flavors
Chapter 35: Kotlin for Java Developers
Section 35 1: Declaring Variables
Section 35 2: Quick Facts
Section 35 3: Equality & Identity
Section 35 4: IF, TRY and others are expressions, not statements
Chapter 36: Java 8 Stream Equivalents
Section 36 1: Accumulate names in a List
Section 36 2: Collect example #5 - find people of legal age, output formatted string
Section 36 3: Collect example #6 - group people by age, print age and names together
Section 36 4: Dierent Kinds of Streams #7 - lazily iterate Doubles, map to Int, map to String, print each
Section 36 5: Counting items in a list after filter is applied
Section 36 6: Convert elements to strings and concatenate them, separated by commas
Section 36 7: Compute sum of salaries of employee
Section 36 8: Group employees by department
Section 36 9: Compute sum of salaries by department
Section 36 10: Partition students into passing and failing
Section 36 11: Names of male members
Section 36 12: Group names of members in roster by gender
Section 36 13: Filter a list to another list
Section 36 14: Finding shortest string a list
Section 36 15: Dierent Kinds of Streams #2 - lazily using first item if exists
Section 36 16: Dierent Kinds of Streams #3 - iterate a range of Integers
Section 36 17: Dierent Kinds of Streams #4 - iterate an array, map the values, calculate the average
Section 36 18: Dierent Kinds of Streams #5 - lazily iterate a list of strings, map the values, convert to Int, find max
Section 36 19: Dierent Kinds of Streams #6 - lazily iterate a stream of Ints, map the values, print results
Section 36 20: How streams work - filter, upper case, then sort a list
Section 36 21: Dierent Kinds of Streams #1 - eager using first item if it exists
Section 36 22: Collect example #7a - Map names, join together with delimiter
Section 36 23: Collect example #7b - Collect with SummarizingInt
Chapter 37: Kotlin Caveats
Section 37 1: Calling a toString() on a nullable type
Appendix A: Configuring Kotlin build
Section A 1: Gradle configuration
Section A 2: Using Android Studio
Section A 3: Migrating from Gradle using Groovy script to Kotlin script
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