Introduction

This is a collection of short code snippets to learn Kotlin's main features from basic to advanced.

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List

1. Hello world (Go to code)
2. String manipulation (Go to code)
3. Variables (Go to code)
4. Null Safety (Go to code)
   • For example, type String? can be null but cannot be assigned to non-null type String.
5. Arrays (Go to code)
6. Conditionals (Go to code)
7. Functions (Go to code)
8. Classes (Go to code)
9. object keyword: static members, singleton, anonymous class (Go to code)
10. Operator overload (Go to code)
    • Define '+' or '++' for custom objects
11. Java in Kotlin (Go to code), and Kotlin in Java (Go to code)
    • See the referenced Java class in Kotlin, and Kotlin file in Java.
12. Diverse tricks (Go to code)
13. Deprecating code (Go to code)
    • It is possible to deprecate a function in multiple levels, and defining an automated code for replacement.
14. Using co-routines, comparing co-routines with threads (Go to code)
    • Kotlin CoRoutines are very light-weight compared to java Thread.
15. Domain Specific Language (DSL) style programming using higher-order functions (Go to code)
16. Class property delegation (Go to code)
    • This is used to intercept the setting / getting of a class property
17. Using Let when there is concurrency (Go to code)
    • Uses a local copy to ensure that a variable will not be null inside a block

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References

1. Kotlin Tutorial - Derek Banas
2. 10 Kotlin Tricks in 10 ish minutes by Jake Wharton
3. Kotlin 102 - Beyond the basics by Hadi Hariri
4. Kotlin Tutorial - Telusko Learnings
5. KotlinConf 2017 - Introduction to Coroutines by Roman Elizarov