methods

go/02-next-level/00-methods.go

@@ -0,0 +1,24 @@
+package main
+
+import "fmt"
+
+type Counter struct {
+	value int
+}
+
+// pointer receiver
+func (c *Counter) Increment() {
+	c.value++
+}
+
+// value receiver
+func (c Counter) String() string {
+	return fmt.Sprintf("Counter value: %d", c.value)
+}
+
+func main() {
+	c := Counter{}
+	fmt.Println(c)
+	c.Increment()
+	fmt.Println(c)
+}