calculator.scala

import scala.math.abs

object HybridStyleCalculator {
  class Calculator {
    
    private var result: Double = 0;

    // Start Java Style
    // Returns, braces and semi-colons
    def getResult(): Double = {
      return result;
    }
    
    def multiply(number: Double): Calculator = {
      if (number == 0) { 
        println("Multiplication skipped: number is 0"); 
      } else { 
        result = result * abs(number); 
      }
      return this;
    }

    // Switch to Python with implicit returns
    // significant whitespace, no returns, no semi colons
    def add(number: Double): Calculator = 
      result += abs(number)
      this

    def subtract(number: Double): Calculator =
      result -= abs(number)
      this
    
  }

  def main(args: Array[String]): Unit = {
    // Call Ruby Style
    // no braces, no dots
    val calc = new Calculator add -5 subtract -3 multiply -2
    println(s"Result: ${calc.getResult()}")
  }
}