diff -r 10e7a90d8e7a -r a751aa1ee4f7 Fahad/CodeSamples/ImplicitParameters.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Fahad/CodeSamples/ImplicitParameters.scala	Sun Nov 09 19:25:10 2014 +0000
@@ -0,0 +1,32 @@
+package Main
+
+abstract class SemiGroup[A] {
+  def add(x: A, y: A): A
+}
+
+abstract class Monoid[A] extends SemiGroup[A] {
+  def unit: A
+}
+
+object ImplicitTest extends App {
+  implicit object StringMonoid extends Monoid[String] {
+    def add(x: String, y: String): String = x concat y
+    def unit: String = ""
+  }
+
+  implicit object IntMonoid extends Monoid[Int] {
+    def add(x: Int, y: Int): Int = (x + y)
+    def unit: Int = 0
+  }
+
+  def sum[A](xs: List[A])(implicit m: Monoid[A]): A =
+    if (xs.isEmpty) m.unit
+    else {
+      println("head: " + xs.head);
+      println("tail: " + xs.tail);
+      m.add(xs.head, sum(xs.tail))
+    }
+
+  println(sum(List(1, 2, 3)))
+  println(sum(List("a", "b", "c")))
+}
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