Date diff

.gitignore

@@ -39,3 +39,4 @@ my-md5/my-md5
 shadir/shadir
 shadirconcurrent/shadirconcurrent
 pinger/pinger 
+datediff/datediff

datediff/main.go

@@ -0,0 +1,28 @@
+package main
+
+import "fmt"
+import "log"
+import "os"
+import "time"
+
+func main() {
+	if len(os.Args) != 3 {
+		log.Fatalln("usage datediff <date1> <date2>")
+	}
+
+	FORMAT := "02/01/2006"
+	d1, err := time.ParseInLocation(FORMAT, os.Args[1], time.Local)
+	if err != nil {
+		log.Fatalln("Invalid date 1", err)
+	}
+	d2, err := time.ParseInLocation(FORMAT, os.Args[2], time.Local)
+	if err != nil {
+		log.Fatalln("Invalid date 2", err)
+	}
+
+	dur := d2.Sub(d1)
+
+	//fmt.Println(dur.String())
+
+	fmt.Println(int64(dur / (24 * time.Hour)))
+}