1. An introduction to Kotlin
Kevin Jones
@kevinrjones

2. What Is Kotiln JVM Language Supports immutability Abhors nulls
Object oriented
Functional
Less cermony than Java

3. You Can Just Code fun main(args: Array<String>) {
println("Hello, World") }

4. Immutability val name:String = "Kevin" val name = "Kevin"
var password:String

5. Templates
val name = "Kevin"
print("My name is $name")

6. Defining Classes class Person { val name:String
val numberOfChildren: Int }

7. Functions Don't need to be part of a class
Are introduced with the 'fun' keyword
Can have default parameters
Can have named parameters
Can 'extend' existing types
infix
operator overloading
tailrec

8. Programming With Types
Interfaces
Classes
final by default
Inheritance
Construction
Data Classes

9. object keyword
object
companion object

10. High level functions
Lambdas
'with' and 'apply'
closures

11. Filtering and Sorting
map
flatMap
filter
predicates

12. Infinite Collections
Sequences in Kotlin

13. Kotlin and null Nullable types Safe call 'Elvis' Safe cast !! let
lateinit

14. Kotlin Collections
listOf
mutableListOf…

15. Higher Order Functions
Inlining
noinline

16. Generics
Reification

17. Summary
A better Java
A better C#?