implemented strategy pattern

behavioral/strategy/strategy.go

@@ -0,0 +1,34 @@
+package strategy
+
+import (
+	"fmt"
+)
+
+// Abstraction
+type LoggerStrategy interface {
+	Write(string) error
+}
+
+// Strategy 1
+type FileLogger struct {}
+func (l FileLogger) Write(data string) error {
+	fmt.Println("Writed to file...")
+	return nil
+}
+
+// Strategy 2
+type DbLogger struct {}
+func (l DbLogger) Write(data string) error {
+	fmt.Println("Writed to db..")
+}
+
+// Consumer
+type Logger struct{
+	logger LoggerStrategy
+}
+
+func (l *Logger) Log(data string) error {
+	l.logger.Write(data)
+}
+
+