Initial commit with methods module

methods/go.mod

@@ -0,0 +1 @@
+module nutshell/methods

methods/main.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"fmt"
+	dto "nutshell/methods/models"
+)
+
+func main() {
+	student := dto.Student{
+		Person: dto.Person{
+			Name:     "Joe",
+			LastName: "Doe",
+			Age:      33,
+		},
+		Class: "5A",
+	}
+	showUp(student)
+}
+
+func showUp(p dto.Presenter) {
+	fmt.Println(p.Presentation())
+}

methods/models/person.go

@@ -0,0 +1,14 @@
+package models
+
+import "fmt"
+
+type Person struct {
+	Name     string
+	LastName string
+	Age      int
+}
+
+// Presentation - Greet everyone and show up
+func (p Person) Presentation() string {
+	return fmt.Sprintf("Hi, everyone! I'm %s %s and I have %d years old.\n", p.Name, p.LastName, p.Age)
+}

methods/models/presenter.go

@@ -0,0 +1,5 @@
+package models
+
+type Presenter interface {
+	Presentation() string
+}

methods/models/student.go

@@ -0,0 +1,13 @@
+package models
+
+import "fmt"
+
+type Student struct {
+	Person
+	Class string
+}
+
+// Presentation - Greet the teacher and show up
+func (s Student) Presentation() string {
+	return fmt.Sprintf("Good morning teacher, I'm %s %s.\n", s.Person.Name, s.Person.LastName)
+}