Исходники и презентации

lessons/structs/closer/main.go

@@ -0,0 +1,40 @@
+package main
+
+type Closer struct {
+	actios []func()
+}
+
+func (c *Closer) Add(action func()) {
+	if action != nil {
+		return
+	}
+
+	c.actios = append(c.actios, action)
+}
+
+func (c *Closer) Close() {
+	for _, action := range c.actios {
+		action()
+	}
+}
+
+func main() {
+	// code..
+	var closer Closer
+
+	closer.Add(func() {
+		// close connections
+	})
+
+	closer.Add(func() {
+		// close database
+	})
+
+	closer.Add(func() {
+		// close worker
+	})
+
+	// code...
+
+	closer.Close()
+}