Исходники и презентации

lessons/interfaces/empty_interfaces_conversion/main.go

@@ -0,0 +1,26 @@
+package main
+
+import "fmt"
+
+type Aboutable interface {
+	About() string
+}
+
+type Book struct {
+	name string
+}
+
+func (book *Book) About() string {
+	return "Book: " + book.name
+}
+
+func main() {
+	var a Aboutable = &Book{"Go 101"}
+	fmt.Println(a) // &{Go 101}
+
+	var i interface{} = &Book{"Rust 101"}
+	fmt.Println(i) // &{Rust 101}
+
+	i = 100
+	fmt.Println(i) // 100
+}