Merge pull request mouredev#5456 from kodenook/develop

Reto #23 - go

Author: Roswell468

Roadmap/23 - SINGLETON/go/kodenook.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+)
+
+type Singleton struct {
+	data string
+}
+
+var instancia *Singleton
+
+var once sync.Once
+
+func GetInstance() *Singleton {
+	once.Do(func() {
+		instancia = &Singleton{data: "Data example"}
+	})
+	return instancia
+}
+
+func main() {
+
+	singleton := GetInstance()
+	fmt.Println(singleton.data)
+
+	other := GetInstance()
+	fmt.Println(other.data)
+
+	singleton.data = "New data"
+
+	fmt.Println(other.data)
+}