restructure: arrays and slices

16-slices/03-slices-vs-arrays-examples/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import "fmt"
+
+// STORY:
+// You want to list the books and games you have
+
+func main() {
+	var books [5]string
+	books[0] = "dracula"
+	books[1] = "1984"
+	books[2] = "island"
+
+	newBooks := [5]string{"ulysses", "fire"}
+	if books == newBooks {
+	}
+	books = newBooks
+
+	games := []string{"kokemon", "sims"}
+	newGames := []string{"pacman", "doom", "pong"}
+	newGames = games
+	games = nil
+	games = []string{}
+
+	var ok string
+	for i, game := range games {
+		if game != newGames[i] {
+			ok = "not "
+			break
+		}
+	}
+
+	if len(games) != len(newGames) {
+		ok = "not "
+	}
+
+	fmt.Printf("games and newGames are %sequal\n\n", ok)
+
+	fmt.Printf("books         : %#v\n", books)
+	fmt.Printf("new books     : %#v\n", newBooks)
+	fmt.Printf("games         : %T\n", games)
+	fmt.Printf("new games     : %#v\n", newGames)
+	fmt.Printf("games's length: %d\n", len(games))
+	fmt.Printf("games's nil   : %t\n", games == nil)
+}