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Scala : language of the future
- 1. SCALA : language ofthe future by Robin Syihab Mindtalk: @robin Twitter: @anvie Email: robin@mindtalk.com
- 2. Scala is a ModernProgramming 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 wereto pick a language to use today other than Java, it would be Scala” ~ James Gosling (father of Java).
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- 5. Java & Scalatimeline
- 6. JVM Languages availabletoday Scala Groovy Fantom Clojure JRuby Jython Kotlin
- 7. Java & JVMLtimeline
- 8. “The legacy ofJava will be the platform, not the language.” ~ Martin Fowler (OOP programming expert)
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- 10. “No other languageon the JVM seems as capable of being a "replacement for Java" as Scala.” ~ Charlies Nutter (JRuby lead)
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- 18. Scala is powerfulfor functional programming
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- 21. Scala is morethan “syntactic sugar language”
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- 23. Scala OOP Object inheritance Objectand method accessibility (public, protected, private). Static method. Mutable & Immutable variable.
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- 27. Traits Like interfaces injava, but can have implementations can have fields can mix-in
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- 30. XML Literals Scala supportXML literals inside of code
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- 34. Pattern Matching animal match{ case cat:Cat => cat.meow() case tiger:Tiger => tiger.hoa() }
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- 37. Pattern Matching: data extraction+ guardian
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- 40. Implicit definition: Viewbounds
- 41. robin say “hello” robin.say(“hello”) LenientInvocation Syntax object method parameter
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- 43. h(x) = yf(x, y)⟼ Currying Function
- 44. We need thissimple code run robustly: + no crash when exception happen. + handle unicode UTF-8 correctly. + no memory leak. Currying Function
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- 50. Partial Function: PatternMatching Parameter
- 51. Partial Function: PatternMatching
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- 53. When to useActor? If we want to build distributed system. Handle massive concurrent request. Needs for build event-driven asynchronous application. High performance lightweight than Thread.
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- 55. Akka Actor: Distributed 100.10.10.1 ActorA 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 inproduction
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- 59. Scala testing framework Scalatest JUnit Spec2 Gatling(performance test)
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- 63. Ok thats soundinteresting, 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 “helloworld” application in minute
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