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The Kotlin Primer
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Introduction
· Understanding the Kotlin Primer
· Maintainability
Basics
Functions & Variables
· Functions
· Variables
Control Flow
· When expression
· Loops
· If expression
Miscellaneous
· Ranges
· Strings & string templates
Nullability & Types
· Nullability
· Types
Functions continued
· Literals
· Function types & literals
· Inline functions
· Tail-recursive functions
· Variable number of arguments
Classes — What we know from Java
Introduction
· Basic class syntax
· Constructors
Properties
· Basics
· Accessors
· Backing fields
· Accessors, continued
· Compile-time constants
· Lateinit
Inheritance
· Basics
· Overriding
Miscellaneous
· Interfaces
· Visibility modifiers
· Nested and inner classes
Generics
· Basics
· Generic variance – motivation
· Generic variance – fundamental principles
· Covariance, Contravariance, Invariance
· Star Projections
Classes — What’s new in Kotlin
Data Classes
· Data Classes
Objects
· Object Declarations
· Object Expressions
· Companion Objects
Delegation
· Delegating interface implementation
· Delegated Properties
· Summary
Sealed hierarchies
· Introduction
· Safely Emulating Dynamic Dispatch
· Modeling Illegal States
· Modeling States and Structure
· Modeling States and Structure: Considerations
Miscellaneous
· Reified Type Parameters
· Enums
· Infix Functions
· Operators
· Type Aliases
· Inline (Value) Classes
· Functional (SAM) Interfaces
Extension Functions
Basics
· Motivation
· Syntax and Behavior
· Functions with Receiver
· Qualified This
· What Extension Functions Are Not
Applications
· Nullable & Generic Receivers
· Generic Receivers — continued
· Operators as Extensions
Scope functions
· Introduction
· also() & apply()
· also() vs. apply()
· let() & takeX()
· run()
· with(), run() vs. with()
· Closing Remarks & Exercises
Domain Specific Languages
· What makes a DSL
· How to make your own
Standard Library
Programming with Result
· Motivation
· Returning a Result
· kotlin.Result
· Combining and Composing Results
· Considerations
Collections & Elementary Functional Programming
· Basic Collections: Introduction
· Functional vs. (?) Object-Oriented Programming
· Collection Operations: Overview
· Transformations
· Filtering
· Single-element access
· Predicates
· Aggregators
· Grouping
Sequences
· Why we need them
· How They Work & How To Use Them
· Yield vs. Return & How Pausing Functions Work
· Iterable vs. Sequence vs. Java Stream
Functions & Variables
· Functions
· Variables
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The Kotlin Primer
Search
Introduction
· Understanding the Kotlin Primer
· Maintainability
Basics
Functions & Variables
· Functions
· Variables
Control Flow
· When expression
· Loops
· If expression
Miscellaneous
· Ranges
· Strings & string templates
Nullability & Types
· Nullability
· Types
Functions continued
· Literals
· Function types & literals
· Inline functions
· Tail-recursive functions
· Variable number of arguments
Classes — What we know from Java
Introduction
· Basic class syntax
· Constructors
Properties
· Basics
· Accessors
· Backing fields
· Accessors, continued
· Compile-time constants
· Lateinit
Inheritance
· Basics
· Overriding
Miscellaneous
· Interfaces
· Visibility modifiers
· Nested and inner classes
Generics
· Basics
· Generic variance – motivation
· Generic variance – fundamental principles
· Covariance, Contravariance, Invariance
· Star Projections
Classes — What’s new in Kotlin
Data Classes
· Data Classes
Objects
· Object Declarations
· Object Expressions
· Companion Objects
Delegation
· Delegating interface implementation
· Delegated Properties
· Summary
Sealed hierarchies
· Introduction
· Safely Emulating Dynamic Dispatch
· Modeling Illegal States
· Modeling States and Structure
· Modeling States and Structure: Considerations
Miscellaneous
· Reified Type Parameters
· Enums
· Infix Functions
· Operators
· Type Aliases
· Inline (Value) Classes
· Functional (SAM) Interfaces
Extension Functions
Basics
· Motivation
· Syntax and Behavior
· Functions with Receiver
· Qualified This
· What Extension Functions Are Not
Applications
· Nullable & Generic Receivers
· Generic Receivers — continued
· Operators as Extensions
Scope functions
· Introduction
· also() & apply()
· also() vs. apply()
· let() & takeX()
· run()
· with(), run() vs. with()
· Closing Remarks & Exercises
Domain Specific Languages
· What makes a DSL
· How to make your own
Standard Library
Programming with Result
· Motivation
· Returning a Result
· kotlin.Result
· Combining and Composing Results
· Considerations
Collections & Elementary Functional Programming
· Basic Collections: Introduction
· Functional vs. (?) Object-Oriented Programming
· Collection Operations: Overview
· Transformations
· Filtering
· Single-element access
· Predicates
· Aggregators
· Grouping
Sequences
· Why we need them
· How They Work & How To Use Them
· Yield vs. Return & How Pausing Functions Work
· Iterable vs. Sequence vs. Java Stream
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· Functions
· Understanding the Kotlin Primer
· When expression
· Types
· Function types & literals