Scala 2.12

• Only runs on Java 8
• Smaller executable footprint - uses new Java 8 JVM features
• Faster execution speeds
• Focus was on the compiler and "future" stability
• 33 Features documented in Release Notes
• 336 PRs from 65 committers
• Still on Java 6/7 ? -- 2.11 will supported for a while to come

Scala 2.12 Futures

• Added flatten so no need to .flatMap(identity) anymore
• Added zip and zipWith to join futures
• New transform method, map and recover implemented with it
• Easy to lift into a Try, someFuture.transform(Try(_))
• New transformWith for flatMap and recoverWith
• onSuccess and onFailure will be deprecated
• "zero" for Future - Future.unit will replace Future.successful(())
• Never completing future - Future.never to prevent memory leaks
• No more use of sun.misc.Unsafe

Scala 2.12 Links

• @odersky Key Note
• @viktorklang All you want to know about Futures in Scala 2.12
• @li_haoyi Strategic Scala Style: Principle of Least Power

Scala 2.13

• 2.13 will focus on libraries, 2.12 focused on the compiler
• Simplified Collections, more inline with Spark, better lazy
• Call for Strawman proposals open now, submit yours
• Scala stdlib split, scala-core and scala-platform

DOTTY

• What is Dotty ?: New Scala Compiler base on Dot
• What is Dot ?: A new simple language used to prove and reason about new Scala features
• Why?:
• • Allows for more "dialects" for the Scala language
  • Keep the language stable with features that are trust worthy
  • Bit more than half the size of current Scala compiler
  • Twice the speed of nsc (Current Scala compiler). Lot more opportunity ahead.
  • Dotty plugin for InteliJ IDE under development

DOT

• Proven foundation for Scala
• Calculus with a minimal language subset
• Concludes and 8 year effort!
• Encode much of the language from this instruction set
• Opens the door to do much more language work with better confidence than before
• Provides a way to prove type soundness for the language
• higher-order unification for type constructor -- SI-2712

DOTTY

Scala Center

• New Steward for Scala, non-profit organization at EPFL
• Independently guide and support the Scala community
• Coordinate and develop open source libraries and tools for the benefit of all Scala users
• Provide deep, and quality, educational materials for Scala

• Money funded/donated -- IBM, Verizon, Golden Sachs, Nitro, Lightbend, 47 degrees

More Details in @heathercmiller Key Note

Session slides & Resources (1 of 2)

Session slides & Resources (2 of 2)