interfaces

interfaces/go.mod

@@ -0,0 +1,3 @@
+module lovelynet.net/interfaces
+
+go 1.17

interfaces/main.go

@@ -0,0 +1,32 @@
+package main
+
+import "fmt"
+
+type bot interface {
+	getGreeting() string
+}
+
+type englishBot struct{}
+type spanishBot struct{}
+
+func main() {
+	eb := englishBot{}
+	sb := spanishBot{}
+
+	printGreetings(eb)
+	printGreetings(sb)
+}
+
+func printGreetings(b bot) {
+	fmt.Println(b.getGreeting())
+}
+
+func (englishBot) getGreeting() string {
+	// Very custom logic
+	return "Hello"
+}
+
+func (spanishBot) getGreeting() string {
+	// Very custom logic
+	return "Hola!"
+}