Change: Scala

created on Jan. 13, 2013, 2:23 a.m. by Hevok & updated on Jan. 13, 2013, 2:29 a.m. by Hevok

Scala is a general purpose programming language designed (as a "better Java") to express common programming patterns in a concise, elegant, and type-safe way.

A class can be simply declared like this:

.. sourcecode:: scala

class ScalaUser(var name:String,var surname:String, var email:String){}

Getters and setters are easy to create:

.. sourcecode:: scala

val setters = tp.members.filter(m=>m.isMethod && m.asMethod.isSetter).map(m=>(cutSetterEnding(m.name.toString),m.asMethod)).toMap

Scala reads and writes as it would be normal English:

.. sourcecode:: scala

something should equal("sfsf")

It is a dynamically typed language and provides similar paradigms like Python. You can for instance simply iterate over a collection:

.. sourcecode:: scala

for{ item<-collection if item=="somevalue" if item.isSomething } yield item

It is even possible to iterate over multiple collection at the same time:

.. sourcecode:: scala

for{item1<-collection1
   item2<-collection2
    if item1=="somevalue"
    if tiem2>item1
} yield( item1.someProp,item2.someProperty)

A basic function/procedure looks like this:

.. sourcecode:: scala

def someFunction(param1, param2) =
{
    ///do something
   (val1,val2)
}

It is not hard to work with OrientDB. To open a database:

.. sourcecode:: scala

val db:ODatabaseDocumentTx = new ODatabaseDocumentTx(url)

To create a document and fill it with data.

In order to save any class to the database all you need is two lines of code, considering you have created an instance of your class somehow:

.. sourcecode:: scala

val doc = new ObjectDocument(myPojo)
doc.save()

Where myPojo is an instance of any class created before. It does not work with nested classes yet, but works well with pojo's (classes with simple fields).

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