add: interface comparison example

2019-09-09 20:48:33 +03:00
parent 68fb9ed07c
commit 1495007ab2
1 changed files with 6 additions and 0 deletions
--- a/interfaces/04-interfaces/main.go
+++ b/interfaces/04-interfaces/main.go
@ -7,6 +7,8 @@

 package main

+import "fmt"
+
 func main() {
 	var (
 		mobydick  = book{title: "moby dick", price: 10}
@ -24,4 +26,8 @@ func main() {
 	var store list
 	store = append(store, &minecraft, &tetris, mobydick, rubik)
 	store.print()
+
+	// interface values are comparable
+	fmt.Println(store[0] == &minecraft)
+	fmt.Println(store[3] == rubik)
 }