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Why Scala should be your next
programming language?
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@r@v!ndh $
Senthil V S
@siliconsenthil
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Scala is pronounced
skah-lah*
* And, not scale-aah?
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Know Java?
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Know Scala?
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https://twitter.com/janschultecom/status/429981920177311744
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• JVM based*
• Multi-paradigm: OO, Functional
• Open sourced
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Basics
• class
• object
• val
• var
• def
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Feature: Type inference
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Feature: Type inference
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Feature: Case classes
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Features: Collection
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Feature: Options
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Feature: Pattern matching
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Feature: Pattern matching
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Feature: Trait
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Feature: Trait
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Feature: Trait
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Feature: Implicits
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Feature: Pimp my library
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Why Scala?
less verbose
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Why Scala?
less verbose
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Why Scala?
less verbose
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Why Scala?
less verbose
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Why Scala?
• Better concurrency
• Immutable data structures
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Ecosystem: Web
• Play
• Lift
• Scalatra
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Ecosystem: Unit Testing
• ScalaTest
• specs2
• Scala Mock
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Ecosystem: Database
• Slick
• Anorm
• Squeryl
• Activate
• SORM
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Ecosystem: Big Data
• Scalding
• Spark
Is Scala the new SQL for big data?
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Build Tools
• SBT
• Maven
• Gradle
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Dev. Tools
• Intellij IDE
• Scala IDE/ Eclipse
• VIM with SBT plugin (yeah.. really…)
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The world is already ahead
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http://zeroturnaround.com/rebellabs/java-tools-and-technologies-landscape-for-2014
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http://zeroturnaround.com/rebellabs/java-tools-and-technologies-landscape-for-2014
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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
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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
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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.
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http://www.indeed.com/jobtrends?q=scala%2C++java&l=&relative=1
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Java interoperability
• Compiles to JVM bytecode
• You can extend java class from Scala & vice
versa
• Scala projects -> jar files
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It’s just a jar
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• No change needed in servers
• Build tools support projects with both Java and
Scala
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But…..
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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
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