Reusable Behavior

Apply a shared trait method to a value.

ReusableBehavior.scala

trait Discount {
  def discounted(price: Int): Int = price - 2
}

class Shop extends Discount {
  override def toString: String = "[shop]"
}

object Main {
  def main(args: Array[String]): Unit = {
    val price = 
    val shop = new Shop()
    val finalPrice = shop.discounted(price)

    println("price=" + price)
    println("finalPrice=" + finalPrice)
  }
}

trait Discount {
  def discounted(price: Int): Int = price - 2
}

class Shop extends Discount {
  override def toString: String = "[shop]"
}

object Main {
  def main(args: Array[String]): Unit = {
    val price = 
    val shop = new Shop()
    val finalPrice = shop.discounted(price)

    println("price=" + price)
    println("finalPrice=" + finalPrice)
  }
}

trait Discount {
  def discounted(price: Int): Int = price - 2
}

class Shop extends Discount {
  override def toString: String = "[shop]"
}

object Main {
  def main(args: Array[String]): Unit = {
    val price = 
    val shop = new Shop()
    val finalPrice = shop.discounted(price)

    println("price=" + price)
    println("finalPrice=" + finalPrice)
  }
}

reusable-behavior A trait method can take a parameter and compute a result. Any class that mixes in the trait reuses that behavior.