Scala : language of the future
- 1. SCALA : language of the future by Robin Syihab Mindtalk: @robin Twitter: @anvie Email: [email protected]
- 2. Scala is a Modern Programming language. Created by Martin Odersky. Static Typing OOP + FP Compiled into bytecode and run on top of JVM. Java compatible binaries. a better Java.
- 3. “If I were to pick a language to use today other than Java, it would be Scala” ~ James Gosling (father of Java).
- 5. Java & Scala timeline
- 6. JVM Languages available today Scala Groovy Fantom Clojure JRuby Jython Kotlin
- 7. Java & JVML timeline
- 8. “The legacy of Java will be the platform, not the language.” ~ Martin Fowler (OOP programming expert)
- 10. “No other language on the JVM seems as capable of being a "replacement for Java" as Scala.” ~ Charlies Nutter (JRuby lead)
- 12. Scala Job Trends
- 14. Java Scala
- 17. Scala Java Regex
- 18. Scala is powerful for functional programming
- 21. Scala is more than “syntactic sugar language”
- 23. Scala OOP Object inheritance Object and method accessibility (public, protected, private). Static method. Mutable & Immutable variable.
- 24. Scala OOP
- 27. Traits Like interfaces in java, but can have implementations can have fields can mix-in
- 30. XML Literals Scala support XML literals inside of code
- 31. XML literals
- 33. LazyVariable Evaluation // Use case
- 34. Pattern Matching animal match { case cat:Cat => cat.meow() case tiger:Tiger => tiger.hoa() }
- 35. Pattern Matching
- 37. Pattern Matching: data extraction + guardian
- 40. Implicit definition: View bounds
- 41. robin say “hello” robin.say(“hello”) Lenient Invocation Syntax object method parameter
- 43. h(x) = y f(x, y)⟼ Currying Function
- 44. We need this simple code run robustly: + no crash when exception happen. + handle unicode UTF-8 correctly. + no memory leak. Currying Function
- 50. Partial Function: Pattern Matching Parameter
- 51. Partial Function: Pattern Matching
- 53. When to use Actor? If we want to build distributed system. Handle massive concurrent request. Needs for build event-driven asynchronous application. High performance lightweight than Thread.
- 55. Akka Actor: Distributed 100.10.10.1 Actor A 100.10.10.2 Actor B 100.10.10.3 Actor C 100.10.10.4 Actor D event stream http://akka.io/
- 56. Akka Actor Support local & remote actor Self-healing using supervisor Decentralized Adaptive load balancing Configuration-driven Extensible Small memory footprint ~2.5 million actors per GB of Heap Event stream easy to handle cluster state
- 57. Akka Actor in production
- 59. Scala testing framework Scalatest JUnit Spec2 Gatling (performance test)
- 60. Specs2 Unit test
- 62. Specs2
- 63. Ok thats sound interesting, but wait... how with the development tools? http://www.thetinylife.com
- 64. Development tools IDE Scala-IDE (eclipse based) NetBeans IntellijIdea Emacs (ENSIME) Build System Maven SBT (Simple Build Tools) Project generator Giter8 JRebel (incremental development)
- 65. giter8 Build Scala “hello world” application in minute
- 66. Thank you