add: type switch

interfaces/06-empty-interface/main.go

@@ -0,0 +1,23 @@
+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+func main() {
+	store := list{
+		book{title: "moby dick", price: 10, published: 118281600},
+		book{title: "odyssey", price: 15, published: "733622400"},
+		book{title: "hobbit", price: 25},
+		puzzle{title: "rubik's cube", price: 5},
+		&game{title: "minecraft", price: 20},
+		&game{title: "tetris", price: 5},
+		&toy{title: "yoda", price: 150},
+	}
+
+	store.discount(.5)
+	store.print()
+}