Scala Programming Examples

Hello World

scala

object HelloWorld {
   def main(args: Array[String]) {
      println("Hello, world!")
   }
}

Compile and Execute Scala Online

scala

object HelloWorld {
   def main(args: Array[String]) {
      println(divide(-1, 2)(3, 4))
   }
   
   def divide(p: (Int, Int))(q: (Int, Int)): Either[String, (Int, Int)] =
   {
       def divTrueInp (x: (Int, Int)): Boolean = 
       if (Math.abs(x._1) < Math.abs(x._2)) false else true

       var out = (p._1 * q._2, p._2 * q._1 )
       var in = 0
       
       if (out._1 > out._2) in = out._1
       else in = out._2
       
       for (i <- 1 to in) {
           if (out._1 % i == 0 && out._2 % i == 0) {
               val x1 = out._1 / i
               val y1 = out._2 / i
               out = (x1, y1)
           }
       }
       
       if (p._2 == 0 || q._2 == 0 ) Left("Zero divisor")
       else if (divTrueInp(p) || divTrueInp(q)) Left("Invalid input")
       else if (divTrueInp(out) || out._2 == 0) Left("Improper result")
       else Right(out)
   }
}

2019-03-22

scala

object HelloWorld {
    def out(liste: List[Int]): Unit = {
        if (liste != Nil) {
            print(liste.head + ", ")
            out(liste.tail)
        }
    }
    def main(args: Array[String]): Unit = {
        out(List(1,2,3))
    }
}

Compile and Execute Scala Online

scala

object HomePage {
   def main(args: Array[String]) {
      println("Hello, world!")
   }
}

Compile and Execute Scala Online

scala

class agescala{
    def age{
        var age:Int = 20;  
if(age > 18){  
    println ("Age is greate than 18")  
}  
    }
}

object Demo {
   def main(args: Array[String]) { 
    var agobj = new agescala()
    agobj.age
}  
 
}

HandsOn Scala

scala

object PatternMatching1
{
    
   
    
    
   def main(args: Array[String])
   {
      def matchText(x : Any) : Any = x match   
      {
          
          
          case 1 => "  One  "
          case "two" => 2
          case y: Int => " You have entered an integer >2   "
          case _ => "many"
          
          
           println(matchText(3)) 
           println(matchText(2))
           println(matchText("two")) 
           println(matchText(" Oops" )) 
    
          
      }   
       
       
   }
  
  
}

Compile and Execute Scala Online

scala

object HelloWorld {
    def main(args: Array[String]) {
        println(zipWith(List(1,2,3,4,5,6),List(1,2,3,4,5,6),(x: Int, y: Int) => x+y))
        
        def zipWith[A,B,C](xs: List[A], ys: List[B], f: (A, B) => C): List[C] = {
            val list = xs.zip(ys)
            for (el <- list) yield f(el._1,el._2)
        }
    }
}

Compile and Execute Scala Online

scala

object HelloWorld {
   def main(args: Array[String]) {
   //I have a List(1 ,2 ,3 ,4 ,5) and trying to get a sublist: List(3, 4) from it by the following way:
    val list = List(1 ,2 ,3 ,4 ,5)
                  //0, 1, 2, 3, 4
                        //3, 4
    var b = list.splitAt(3)._2
    println(b)
    println(sum(list))
    def sum(xs: List[Int]): Int = xs match {
      case Nil => 0
      case _ :: tail if tail.length==0 => 0 // size 1
      case _ :: tail if tail.length==2 => tail(1) //size 2
      case _ :: tail if tail.length>2 => tail(0) + tail(1) + sum(tail.splitAt(3)._2)
    }
   }
}

test

scala

object HelloWorld {
   def main(args: Array[String]) {
      println("Hello, world!")
   }
}

Skype Interview with Zubko Zinovii, Middle Scala

scala

object HelloWorld {
   def main(args: Array[String]) {
      println("Hello, world!")
   }
}

Follow

Newsletter