Kotlin fundamentals

Steps

• #01 Basic Syntax
  • 1.1 Package definition and imports
  • 1.2 Program entry point
  • 1.3 Function
  • 1.4 Variables
    • 1.4.1 Read-only local variables are defined using the keyword val
    • 1.4.2 Variables that can be reassigned use the var keyword.
  • 1.5 Creating classes and instances
  • 1.6 Inheritance
  • 1.7 Comments
  • 1.8 String templates
  • 1.9 Conditional expressions
  • 1.10 for loop
  • 1.11 while loop
  • 1.12 when Expression
  • 1.13 Ranges
  • 1.14 Nullable values and null checks
  • 1.15 Exceptions
  • 1.16 Type checks and automatic casts
• #02 Idioms
  • 2.1 Create DTOs (POJOs/POCOs)
  • 2.2 Default values for function parameters
  • 2.3 Filter a list
  • 2.4 Check the presence of an element in a collection
  • 2.5 String interpolation
  • 2.6 Instance checks
  • 2.7 Read-only list
  • 2.8 Read-only map
  • 2.9 Access a map entry
  • 2.10 mutableMapOf
  • 2.11 Access a map entry
  • 2.12 Traverse a map or a list of pairs
  • 2.13 Lazy property
  • 2.14 Extension functions
  • 2.15 Create a singleton
  • 2.16 Instantiate an abstract class
  • 2.17 If-not-null shorthand
  • 2.18 If-not-null-else shorthand
  • 2.19 Execute a statement if null
  • 2.20 Get first item of a possibly empty collection
  • 2.21 Execute if not null
  • 2.22 Map nullable value if not null
  • 2.23 Return on when statement
  • 2.24 try-catch expression
  • 2.25 if expression
  • 2.26 Builder-style usage of methods that return Unit
  • 2.27 Single-expression functions
  • 2.28 Call multiple methods on an object instance (with)
  • 2.29 Configure properties of an object (apply)
  • 2.30 Swap two variables
  • 2.31 Mark code as incomplete (TODO)
• The remaining documentation can be consulted at http:// https://kotlinlang.org/docs