learngo/16-slices/exercises/02-empty/main.go

// 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"

// ---------------------------------------------------------
// EXERCISE: Assign empty slices
//
//   Assign empty slices to all the slices that you've declared in the previous
//   exercise, and print them here.
//
//
// EXPECTED OUTPUT
//  names    : []string 0 false
//  distances: []int 0 false
//  data     : []uint8 0 false
//  ratios   : []float64 0 false
//  alives   : []bool 0 false
// ---------------------------------------------------------

func main() {
	var (
		names     []string  // The names of your friends
		distances []int     // The distances
		data      []byte    // A data buffer
		ratios    []float64 // Currency exchange ratios
		alives    []bool    // Up/Down status of web servers
	)

	fmt.Printf("names    : %T %d %t\n", names, len(names), names == nil)
	fmt.Printf("distances: %T %d %t\n", distances, len(distances), distances == nil)
	fmt.Printf("data     : %T %d %t\n", data, len(data), data == nil)
	fmt.Printf("ratios   : %T %d %t\n", ratios, len(ratios), ratios == nil)
	fmt.Printf("alives   : %T %d %t\n", alives, len(alives), alives == nil)
}