restructure: arrays and slices

16-slices/exercises/08-append-2/main.go

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+package main
+
+// ---------------------------------------------------------
+// EXERCISE: Append #2
+//
+//  1. Create the following nil slices:
+//     + Pizza toppings
+//     + Departure times
+//     + Student graduation years
+//     + On/off states of lights in a room
+//
+//  2. Append them some elements (use your creativity!)
+//
+//  3. Print all the slices
+//
+//
+// EXPECTED OUTPUT
+// (Your output may change, mine is like so:)
+//
+//  pizza       : [pepperoni onions extra cheese]
+//
+//  graduations : [1998 2005 2018]
+//
+//  departures  : [2019-01-28 15:09:31.294594 +0300 +03 m=+0.000325020
+//  2019-01-29 15:09:31.294594 +0300 +03 m=+86400.000325020
+//  2019-01-30 15:09:31.294594 +0300 +03 m=+172800.000325020]
+//
+//  lights      : [true false true]
+//
+//
+// HINTS
+//  + For departure times, use the time.Time type. Check its documentation.
+//
+//      now := time.Now()     -> Gives you the current time
+//      now.Add(time.Hour*24) -> Gives you a time.Time 24 hours after `now`
+//
+//  + For graduation years, you can use the int type
+// ---------------------------------------------------------
+
+func main() {
+}

16-slices/exercises/08-append-2/solution/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"
+	"time"
+)
+
+func main() {
+	// ------------------------------------------------------------
+	// Create nil slices
+	// ------------------------------------------------------------
+
+	// Pizza toppings
+	var pizza []string
+
+	// Departure times
+	var departures []time.Time
+
+	// Student graduation years
+	var grads []int
+
+	// On/off states of lights in a room
+	var lights []bool
+
+	// ------------------------------------------------------------
+	// Append them some elements (use your creativity!)
+	// ------------------------------------------------------------
+	pizza = append(pizza, "pepperoni", "onions", "extra cheese")
+
+	now := time.Now()
+	departures = append(departures,
+		now,
+		now.Add(time.Hour*24), // 24 hours after `now`
+		now.Add(time.Hour*48)) // 48 hours after `now`
+
+	grads = append(grads, 1998, 2005, 2018)
+
+	lights = append(lights, true, false, true)
+
+	// ------------------------------------------------------------
+	// Print the slices
+	// ------------------------------------------------------------
+
+	fmt.Printf("pizza       : %s\n", pizza)
+	fmt.Printf("\ngraduations : %d\n", grads)
+	fmt.Printf("\ndepartures  : %s\n", departures)
+	fmt.Printf("\nlights      : %t\n", lights)
+}