2013-03: adding an old learning lunch

2013/03-golang-learning-lunch/4-struct-func/main.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+  "fmt"
+  "time"
+)
+
+const (
+  IN_UTERO = iota
+  NEW_BORN
+  GROWING
+  LIVING
+  DYING
+  DEAD
+)
+
+type Person struct {
+  Name string
+  Dob *time.Time
+  State byte
+}
+
+func (p *Person) DobString() string {
+  if (p.Dob == nil) {
+    return ""
+  }
+  return p.Dob.String()
+}
+
+func (p *Person) ComeToLife() {
+  t := time.Now()
+  p.Dob = &t
+  p.State = NEW_BORN
+}
+
+
+func main() {
+  // START OMIT
+  p := Person{Name: "John Doe", State: IN_UTERO}
+  fmt.Printf("%s, %s\n", p.Name, p.DobString())
+
+  p.ComeToLife()
+  fmt.Printf("%s, %s\n", p.Name, p.DobString())
+  // STOP OMIT
+}
+