Why scala should be your next programming language?

Transcript

1. Why Scala should be your next programming language?
2. @r@v!ndh $ Senthil V S @siliconsenthil
3. Scala is pronounced skah-lah* * And, not scale-aah?
4. Know Java?
5. Know Scala?
6. https://twitter.com/janschultecom/status/429981920177311744
8. • JVM based* • Multi-paradigm: OO, Functional • Open sourced
9. Basics • class • object • val • var • def
10. Feature: Type inference
11. Feature: Type inference
12. Feature: Case classes
13. Features: Collection
14. Feature: Options
15. Feature: Pattern matching
16. Feature: Pattern matching
17. Feature: Trait
18. Feature: Trait
19. Feature: Trait
20. Feature: Implicits
21. Feature: Pimp my library
22. Why Scala? less verbose
23. Why Scala? less verbose
24. Why Scala? less verbose
25. Why Scala? less verbose
26. Why Scala? • Better concurrency • Immutable data structures
27. Ecosystem: Web • Play • Lift • Scalatra
28. Ecosystem: Unit Testing • ScalaTest • specs2 • Scala Mock
29. Ecosystem: Database • Slick • Anorm • Squeryl • Activate • SORM
30. Ecosystem: Big Data • Scalding • Spark Is Scala the new SQL for big data?
31. Build Tools • SBT • Maven • Gradle
32. Dev. Tools • Intellij IDE • Scala IDE/ Eclipse • VIM with SBT plugin (yeah.. really…)
33. The world is already ahead
35. http://zeroturnaround.com/rebellabs/java-tools-and-technologies-landscape-for-2014
36. http://zeroturnaround.com/rebellabs/java-tools-and-technologies-landscape-for-2014
37. I can honestly say if someone had shown me the Programming in Scala book by Martin Odersky, Lex Spoon & Bill Venners back in 2003 I'd probably have never created Groovy. ! - James Strachan, Creator of Groovy http://macstrac.blogspot.in/2009/04/scala-as-long-term-replacement-for.html
38. Scala, it must be stated, is the current heir apparent to the Java throne. No other language on the JVM seems as capable of being a "replacement for Java" as Scala, and the momentum behind Scala is now unquestionable ! - Charles Nutter, creator of JRuby http://blog.headius.com/2009/04/future-part-one.html
39. Which Programming Language would you use *now* on top of JVM, except Java? http://www.adam-bien.com/roller/abien/entry/java_net_javaone_which_programming The answer was surprisingly fast and very clear. Scala.
40. http://www.indeed.com/jobtrends?q=scala%2C++java&l=&relative=1
42. Java interoperability • Compiles to JVM bytecode • You can extend java class from Scala & vice versa • Scala projects -> jar files
43. It’s just a jar
44. • No change needed in servers • Build tools support projects with both Java and Scala
46. But…..
47. Downsides • Slow compilation • Steep learning curve to know the internal features • Powerful features that can cause unreadable code when misused • Hard time debugging • Tool support