Alexander Aronowitz - Programming Kotlin: Enhance your skills for Android development using Kotlin

Introducing Kotli n ............................................................................................ Why Kotlin? ....................................................................................................... Who is this book for? ............................................................................................. How to use this book .............................................................................. For the curious ............................................................................................ Tasks ..........................................................................................................

Typographic conventions ............................................................................... Looking ahead ............................................................................................... From the publisher ............................................................................................. Chapte r . Your first Kotlin application ......................................................... Installing IntelliJ IDEA ...................................................................................

Your first Kotlin project .................................................................................. Your first Kotlin file ............................................................................... Running your file in Kotlin language ................................................................ Kotlin REPL ............................................................................................................. For the curious: why use IntelliJ? ...................................................... For the curious: programming for the JVM ......................................................

Assignment: REPL arithmetic .................................................................................... Chapte r . Variables, constants and types ................................................................... Types ..................................................................................................................... Variable declaration ....................................................................................... Kotlin built-in types ................................................................................

Read-only variables ........................................................... Automatic type detection ...................................................................... Compile Time Constants ............................................................................ Exploring Kotlin Bytecode ......................................................................................... For the curious: Java simple types in Kotlin ........................................................ Quest: hasSteed .................................................................................................

Quest: Unicorn Horn ..................................................................................... Quest: Magic Mirror ................................................................................. Chapte r . Conditional constructions ................................................................................. If / else statements ................................................................................................... Adding conditions ........................................................................................

Nested if / else statements ........................................................................... More elegant conditionals ........................................................... Intervals ............................................................................................................. When conditional expression ................................................................................... Template strings ................................................................................................ Assignment: trying intervals ................................................................................

Task: displaying extended information about the aura ............................................... Assignment: Customizable Status Bar Format ............................................... Chapte r . Functions ...................................................................................................... Highlighting code in a function ................................................................................... Anatomy of function ................................................................................................

Function header .......................................................................................... Function body ................................................................................................... Function scope ............................................................................ Function call ...................................................................................................... Function refactoring ........................................................................................... We write our functions .....................................................................................

Default arguments ...................................................................................... Functions with a single expression .................................................................. Functions with the return type Unit .................................................................... Named function arguments ......................................................................... For the curious: the Nothing type ............................................................................... For the curious: file-level functions in Java ...................................................

For the curious: function overloading .................................................................. For the curious: function names in backticks ........................................ Assignment: functions with a single expression ................................................. Quest: intoxicating effect of fireball .................................................................. Assignment: intoxicated state ..................................................................... Chapte r .

Anonymous functions and functional types ........................................... Anonymous functions ............................................................................................ Functional types ................................................................................... Implicit return ................................................................................................. Functional arguments ................................................................................ Keyword it ................................................................................................

Taking multiple arguments ...................................................................... Support for automatic type detection ................................................. Function declaration that takes a function ............................................ Abbreviated syntax ...................................................................................... Built-in functions ........................................................................................... Function link .............................................................................................

Function type as return type ................................................................... For the curious: Kotlin lambdas are closures ............................................... For the curious: lambdas vs. anonymous inner classes ...................... Chapte r . Null safety and exceptions ................................................................