scala

Scala

• case class:

  • Implement immutable data
  • Useful for Pattern match
  • No need to use new to create an object (implement apply method)
  • Methods: toString, equal (shallow copy)

• object

  • Class that have only one object (singleton)
  • It's created lazy

• case object

  • It's serializable
  • Has a default hashCode implementation
  • Has an improved implementation of toString
  • Can access private elements of its companion class

• High order function:

  • Function that takes other function as parameter
  • Return other function

• Try/ Catch

  • Traditional try/catch allows to catch all suspected block using case statement

• Curring

• Abstract class vs Trait

  • Abstract: to be used when
    • We require consustructor argument
    • Code will be called by java
    • class Extends only one abstract class

Sbt

Commands

• clean, compile, package, update, test, inspect,...

Test

ScalaTest