2013-03: adding an old learning lunch

2013/03-golang-learning-lunch/10-abstracts/main.go

@@ -0,0 +1,39 @@
+package main
+
+func main() {
+  jeep := Hummer{}
+  h(jeep)
+  jeep.Where()
+  c(jeep)
+}
+
+
+type Car interface {
+  Honk()
+  Crank()
+}
+
+func c(some interface{}) {
+  some.(Car).Crank()
+}
+func h(some interface{}) {
+  some.(Car).Honk()
+}
+
+// Implement the Car interface
+type Hummer struct {
+  Car
+}
+
+func (h Hummer) Honk() {
+  println("BEEP BEEP")
+}
+
+func (h Hummer) Where() {
+  println("Who's got the keys to the jeep?")
+}
+
+func (h Hummer) Crank() {
+  println("VROOOOOOM")
+}
+