The busy Java developer's guide to Scala: Implementation inheritance - The Diigo Meta page

• 20 Jul 10
  

  Esfand S

  scala inheritance

  • Recall from previous articles  that Scala treats functions as values, just as it does any other value in the language, like Int, Float, or Double. I can leverage that in this case by modeling my Person to have doSomething not as a method to be overridden in a derived class, but as a function value to be invoked, replaced, and extended.
  • This is an extension of the "higher order functions" concept that functional programmers toss around.
  • In Scala, because the primary constructor appears on the class declaration, instead of as a "traditional" member of the class, passing parameters up to the base takes on a whole new dimension.
  • In Scala, primary constructor parameters are  passed on the class line, but you can also use the val modifier on these parameters in order to easily introduce accessors (and mutators, in the case of var) on the class itself.
  • Scala doesn't differentiate fields from methods the way that the Java language does. This is actually a deliberate design decision that allows Scala programmers to "hide" the distinction between fields and methods quite easily from those who use the base class.
  • the base class from which all Scala classes inherit, including types like Int, Float, Double, and the other numeric types, is the scala.Any type, which defines a core set of methods available on any type in Scala: ==, !=, equals, hashCode, toString, isInstanceOf, and asInstanceOf,

  4 more annotations...

• 02 Apr 09
  

  Navneet Kumar

  Scala IBM Developer-Works Java

• 04 Sep 08
  

  Loren Rosen

  Scala

• 09 Jun 08
  

  Oroz Odarrut

  scala todo

• 30 May 08
  

  DJHell .

  developerWorks IBM Java Polymorphismus Scala Vererbung development articles

• 29 May 08
  

  Christian Winkler

  scala

• 

  trikelef

  java scala developerworks

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