Wondering in Kotlin Multiverse - Turing Community

🔊 Wajahat Karim talks about the history and evolution of Kotlin and how it got to Kotlin Multiplatform supporting all major targets like Android, iOS, Web, Desktops etc.

Video: https://youtu.be/ajyzYVB6Mic

This event was organized by Turing Community. https://community.turing.com/events/details/turing-apac-community-presents-whats-new-in-kotlin/

Transcript

1. Wondering in Kotlin
   Multiverse
   Wajahat Karim
   Google Developer Expert in Android
   wajahatkarim.com
   

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2. This is Wajahat Karim!
   - Google Developer Expert in Android
   - Over 8 years experience in Android
   - Open Source Contributor
   - Technical Blogs & Books Writer
   - Love to share my knowledge with others
   Follow me on Twitter @WajahatKarim
   Visit my website: wajahatkarim.com
   

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3. life begins
   at the end of your
   COMFORT
   ZONE
   -Neale Donald Walsch-
   

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4. Modern Language
   

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6. 2016 2017 2018 2019 2020 2022
   Kotlin Timeline
   

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7. 2016 2017 2018 2019 2020 2022
   1.0
   Kotlin Timeline
   

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8. 2016 2017 2018 2019 2020 2022
   1.0 Google I/O: Kotlin Officially supported language for Android
   Kotlin Timeline
   

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9. 2016 2017 2018 2019 2020 2022
   1.0
   Google I/O: Kotlin Officially supported language for Android
   Google I/O: Android goes Kotlin-first
   Kotlin Timeline
   

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10. 2016 2017 2018 2019 2020 2022
    1.0
    Google I/O: Kotlin Officially supported language for Android
    Google I/O: Android goes Kotlin-first
    Coroutines Preferred
    Kotlin Timeline
    

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11. Kotlin Timeline
    2016 2017 2018 2019 2020 2022
    1.0
    Google I/O: Kotlin Officially supported language for Android
    Google I/O: Android goes Kotlin-first
    You are here
    Coroutines Preferred
    

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12. WHY KOTLIN?
    

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13. Expressiveness Safety
    Interoperability Structured
    concurrency
    

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14. - Google Preferred Language
    - Statistically typed
    - Type Inference
    - Developed by Jetbrains
    - Concise
    - 100% interoperable with Java
    - Null Safety
    - And many more.
    

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15. Java vs Kotlin
    

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16. Java to Kotlin
    

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17. Tools For Kotlin.
    

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18. class MainActivity : AppCompatActivity () {
    override fun onCreate(savedInstanceState: Bundle?) {
    ...
    fab.setOnClickListener { view ->
    Snackbar.make(view,
    "Hello ${name.capitalize()}",
    Snackbar.LENGTH_LONG).show()
    }
    fab.backgroundTintList = backgroundTintList
    }
    }
    A Wide Kotlin Example
    

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19. class MainActivity : AppCompatActivity () {
    override fun onCreate(savedInstanceState: Bundle?) {
    ...
    fab.setOnClickListener { view ->
    Snackbar.make(view,
    "Hello ${name.capitalize()}",
    Snackbar.LENGTH_LONG).show()
    }
    fab.backgroundTintList = backgroundTintList
    }
    }
    Nullability in the
    type system
    A Wide Kotlin Example
    

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20. class MainActivity : AppCompatActivity () {
    override fun onCreate(savedInstanceState: Bundle?) {
    ...
    fab.setOnClickListener { view ->
    Snackbar.make(view,
    "Hello ${name.capitalize()}",
    Snackbar.LENGTH_LONG).show()
    }
    fab.backgroundTintList = backgroundTintList
    }
    }
    Nullability in the
    type system
    Lambdas
    A Wide Kotlin Example
    

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21. class MainActivity : AppCompatActivity () {
    override fun onCreate(savedInstanceState: Bundle?) {
    ...
    fab.setOnClickListener { view ->
    Snackbar.make(view,
    "Hello ${name.capitalize()}",
    Snackbar.LENGTH_LONG).show()
    }
    fab.backgroundTintList = backgroundTintList
    }
    }
    Nullability in the
    type system
    Lambdas
    Extension
    functions
    A Wide Kotlin Example
    

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22. class MainActivity : AppCompatActivity () {
    override fun onCreate(savedInstanceState: Bundle?) {
    ...
    fab.setOnClickListener { view ->
    Snackbar.make(view,
    "Hello ${name.capitalize()}",
    Snackbar.LENGTH_LONG).show()
    }
    fab.backgroundTintList = backgroundTintList
    }
    }
    Nullability in the
    type system
    Lambdas
    Template
    expressions
    Extension
    functions
    A Wide Kotlin Example
    

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23. class MainActivity : AppCompatActivity () {
    override fun onCreate(savedInstanceState: Bundle?) {
    ...
    fab.setOnClickListener { view ->
    Snackbar.make(view,
    "Hello ${name.capitalize()}",
    Snackbar.LENGTH_LONG).show()
    }
    fab.backgroundTintList = backgroundTintList
    }
    }
    Nullability in the
    type system
    Lambdas
    Template
    expressions
    Extension
    functions
    Property access
    syntax for getters
    and setters
    A Wide Kotlin Example
    

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24. ● Data Classes
    ● Extension Methods
    ● Elvis Operator
    ● Properties
    ● Default Parameters
    ● Type Aliases
    ● Named Parameters
    ● Spread Operator
    ● Auto Casts
    ● Covariance
    ● Null Safety
    ● Operator Overloading
    ● Type Inference
    ● DSL Support
    ● Type-Safe Builders
    ● Coroutines
    ● String Interpolation
    ● Ranges
    ● Map Array Syntax
    ● Inline Functions
    ● Sealed Classes
    ● Delegation
    ● Destructuring
    ● KDoc
    

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25. But wait….
    

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49. • Advantages over Java 7 are overwhelming
    • Java 8 introduced
    • Lambdas
    • Null safety (“Optional” class)
    • Default methods
    • Streams API
    • New Date & Time API
    Java strikes back with Java 8
    

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50. • Is more elegant, concise and safe
    • Has more cool stuff
    But even with Java 8 Kotlin still...
    

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51. Resources
    • https://kotlinlang.org/
    • https://play.kotlinlang.org/
    • https://developer.android.com/courses/fundamentals-training/toc-v2
    

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52. Thank you for listening...
    @WajahatKarim
    wajahatkarim.com youtube.com/c/wajahatkarim3
    

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