Initial data commit

Task/Singleton/Go/singleton-2.go

@@ -0,0 +1,14 @@
+package singlep
+
+// package level data declarations serve as singleton instance variables
+var X, Y int
+
+// package level initialization can serve as constructor code
+func init() {
+    X, Y = 2, 3
+}
+
+// package level functions serve as methods for a package-as-a-singleton
+func F() int {
+    return Y - X
+}