gistfile1.scala

trait ICalculatingStrategy {
	def calculate(a: Int, b: Int): Int
}

object CalculatingStrategies {
	@inline val Add = 2
	@inline val Multiply = 3
}

val CalculatingOperations = Map(
	CalculatingStrategies.Add -> new ICalculatingStrategy{
		override def calculate(a: Int, b: Int) = a + b
	},
	CalculatingStrategies.Multiply -> new ICalculatingStrategy{
		override def calculate(a: Int, b: Int) = a * b
	}
)

CalculatingOperations(CalculatingStrategies.Multiply).calculate(3, 2)