commit e16855e607129f4121d7b04ae7a7fac137011804
Author: Alex Kotov <kotovalexarian@gmail.com>
Date:   Tue Nov 17 07:48:34 2020 +0500

    Add code

diff --git a/1-pointers-in-go/Makefile b/1-pointers-in-go/Makefile
new file mode 100644
index 0000000..d476aff
--- /dev/null
+++ b/1-pointers-in-go/Makefile
@@ -0,0 +1,2 @@
+all:
+	go run main.go
diff --git a/1-pointers-in-go/main.go b/1-pointers-in-go/main.go
new file mode 100644
index 0000000..bd8bf9e
--- /dev/null
+++ b/1-pointers-in-go/main.go
@@ -0,0 +1,55 @@
+package main
+
+import (
+    "fmt"
+    "time"
+)
+
+type Person struct {
+    firstName string
+    lastName string
+    birthday time.Time
+}
+
+func main() {
+    birthday, _ := time.Parse("2006-Jan-02", "1994-Aug-10")
+
+    person := Person{
+        firstName: "Alex",
+        lastName: "Kotov",
+        birthday: birthday,
+    }
+
+    printPersonByValue(person)
+    printPersonByRefSafe(&person)
+    printPersonByRefUnsafe(&person)
+    printPersonByRefSafe(nil)
+    printPersonByRefUnsafe(nil)
+}
+
+func printPersonByValue(person Person) {
+    fmt.Println("=== by value =====================================")
+    fmt.Println("First name:", person.firstName)
+    fmt.Println("Last name: ", person.lastName)
+    fmt.Println("Birthday:  ", person.birthday)
+}
+
+func printPersonByRefSafe(person *Person) {
+    fmt.Println("=== by reference (safe) ==========================")
+
+    if person == nil {
+        fmt.Println("nil pointer, skip...")
+        return
+    }
+
+    fmt.Println("First name:", person.firstName)
+    fmt.Println("Last name: ", person.lastName)
+    fmt.Println("Birthday:  ", person.birthday)
+}
+
+func printPersonByRefUnsafe(person *Person) {
+    fmt.Println("=== by reference (unsafe) ========================")
+    fmt.Println("First name:", person.firstName)
+    fmt.Println("Last name: ", person.lastName)
+    fmt.Println("Birthday:  ", person.birthday)
+}