This document provides an overview of the Kotlin programming language, including its history and key features. It discusses how Kotlin originated as a language developed by JetBrains to overcome issues with Java, and how it has gained popularity as an alternative to Java that is fully interoperable. The document outlines Kotlin's core features such as null safety, extensions, lambdas, and interoperability with Java code, positioning it as a pragmatic and safer language for modern app development.

1. Why Kotlin?

2. Learn Kotlin in 45'

3. Why Kotlin?

4. Some History
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5. The Kotlin Language
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6. Constants and Variables
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No
semicolon
here ;)

7. Control Flow
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8. Functions
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9. Functions
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Simple string
Interpolation

10. Classes
data classes:
autogenerated
implementations of
universal methods
(equals, hashCode
etc)

11. Modifiers
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○ "Design and document for inheritance
or else prohibit it"
Joshua J. Bloch, Effective Java
ps. Lukas Lechner has written a series of articles on
"How Effective Java influenced Kotlin" (http://lukle.at)
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12. Properties
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13. No static keyword
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14. Extensions
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15. Null Checks
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"I call it my billion-dollar mistake.
It was the invention of the null reference in 1965"
Tony Hoare

16. Not-null assertion operator !!

17. Safe Casting
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18. Lamdas and Higher Order Functions

19. Collections
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Chained
Calls

20. Delegation
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Class Car inherits from an interface Nameable
and delegates all of its public methods to a
delegate object defined with the by keyword

21. Domain-specific language construction
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23. Hello World
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24. Let’s Mix with some Java

25. Java from Kotlin
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26. Convert Java to Kotlin

27. Utility
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28. Kotlin from Java
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29. Libraries & Resources
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[REF: Jetbrains Kotlin blog]

30. Kotlin also lives outside the JVM
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[REF: Jetbrains Kotlin blog]

31. Any Disadvantages?
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32. Name shadowing
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33. Null Safety vs Java Interoperability

34. In my

35. My World

36. Met Java in 2000
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37. Java was Cool
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38. Hardcore Devs
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39. Two decades later
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40. Why Kotlin?

41. Final Thoughts
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[REF: Pinterest Engineering]
I am HERE!

42. Questions?
Thank you!