Scala: Method overloading over generic types

Question

In C# I can overload methods on generic type as shown in the example below:

// http://ideone.com/QVooD
using System;
using System.Collections.Generic;

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Answer 1

You would not do it like that in Scala. Why try to emulate something that can never work properly given JVM restrictions? Try idiomatic Scala instead:

trait Fooable[T] {
  def foo : Unit
}

object IntListFoo extends Fooable[List[Int]] {
  def foo {
    println("I just print")
  }
}

class DoubleListFoo(val l : List[Double]) extends Fooable[List[Double]] {
  def foo {
    println("I iterate over list and print it.")
    l.foreach { e =>
      println(e)
    }
  }
}

implicit def intlist2fooable(l : List[Int]) = IntListFoo
implicit def doublelist2fooable(l : List[Double]) = new DoubleListFoo(l)

Then, you can execute code like

List(1,2,3,4).foo
List(1.0,2.0,3.0).foo