Intro to Kotlin for GDG Minia DevFest
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The document introduces Kotlin, a statically typed programming language that targets the JVM. It was created by JetBrains, the developers of IntelliJ IDEA. Kotlin supports both functional and object-oriented paradigms and is designed to be pragmatic, safe, concise and interoperable with Java. It aims to reduce boilerplate code and avoid errors like null pointer exceptions. The document highlights Kotlin's strengths like modeling data concisely, creating reusable abstractions, and expressing domain-specific languages. It provides examples of modeling data in Java and Kotlin. In addition, the document discusses reactive programming in Kotlin and ensuring support for existing Java frameworks and libraries. It ends with resources for learning
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Intro to Kotlin for GDG Minia DevFest
- 1. Intro to Kotlin Prepared by Shady Selim For GDG Minia DevFest On 9/10/2017 GDG Minia + @Kotlin.Cairo #Kotlin #DevFestMENA
- 2. Speaker Bio • Official Google Speaker • GDG Helwan Founder & Leader • Kotlin Cairo User Group Founder • Mentor in Udacity Nanodegree • Mobile & Web Evangelist • Technology savvy • Think tank • UI/UX freak www.linkedin.com/in/shadyselim/ @dr_Shady_Selim 2 +
- 3. Who created Kotlin? • IntelliJ IDEA • PhpStorm • ReSharper • PyCharm • RubyMine • … others 3 +
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- 7. Is Kotlin Really new? 7 +
- 8. Why Should I care!!? • Statically typed programming language targeting the JVM • Support for functional and OO paradigms • Pragmatic, safe, concise, great Java interop • Free and open-source • Drastically reduce the amount of boilerplate code • Lambda expression • Avoid entire classes of errors such as null pointer exceptions • Java 9 is … 8 +
- 9. The Strengths of Kotlin • Modeling the data of your application concisely and expressively • Creating reusable abstractions using functional programming techniques • Creating expressive domain-specific languages (DSL) • Java interop ensures that all existing Java frameworks can be used • No rewrite required to start using Kotlin in existing codebase • Existing investment is fully preserved 9 +
- 11. Java Model Example, cont. 11 +
- 12. Java Model Example, cont. 12 +
- 13. Java Model Example, cont. 13 +
- 14. Kotlin Model Example, cont. 14 +
- 15. The Strength Points 15 + • In addition to all what was mentioned • Extensions • Anko (Commons, Layouts, SQLite, & Coroutines) • No new • No semi colon • Smart casting • Great IDE and tooling supports • Variables (val vs. var) • functions
- 16. Do you like reactive programming? 16 +
- 17. You will not miss your frameworks or libraries 17 +
- 18. You will not miss your frameworks or libraries 18 +
- 19. You will not miss your frameworks or libraries 19 +
- 20. You will not miss your frameworks or libraries 20 +
- 21. kotlin.link 21 +
- 22. Resources • https://kotlinlang.org/ • https://m.signalvnoise.com/kotlin-its-the-little-things-8c0f501bc6ea • https://www.jetbrains.com/ • https://www.slideshare.net/intelliyole/kotlin-why-do-you-care • https://github.com/ReactiveX/RxKotlin • https://spring.io/blog/2016/02/15/developing-spring-boot-applications- with-kotlin • https://www.slideshare.net/makingx/spring-kotlin • https://kotlin.link/ • http://www.overrideandroid.info/2017/04/kotlin-do-more-with-less- code.html 22 +
- 23. Questions!? 23 +