learngo/16-slices/exercises/03-slice-literal/main.go

// Copyright © 2018 Inanc Gumus
// Learn Go Programming Course
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
//
// For more tutorials  : https://learngoprogramming.com
// In-person training  : https://www.linkedin.com/in/inancgumus/
// Follow me on twitter: https://twitter.com/inancgumus

package main

import "fmt"

// ---------------------------------------------------------
// EXERCISE: Assign slice literals
//
//   1. Assign the following data using slice literals to the slices that
//      you've declared in the first exercise.
//
//    1. The names of your three best friends (to the names slice)
//
//    2. The distances to five different locations (to the distances slice)
//
//    3. Five bytes of data (to the data slice)
//
//    4. Two currency exchange ratios (to the ratios slice)
//
//    5. Up/Down status of four different web servers (to the alives slice)
//
//  2. Print their type, length and whether they're equal to nil value or not
//
//  3. Compare the length of the distances and the data slices; print a message
//     if they are equal (use an if statement).
//
//
// EXPECTED OUTPUT
//  names    : []string 3 false
//  distances: []int 5 false
//  data     : []uint8 5 false
//  ratios   : []float64 2 false
//  alives   : []bool 4 false
//  The length of the distances and the data slices are the same.
// ---------------------------------------------------------

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
	)

	names = []string{}
	distances = []int{}
	data = []byte{}
	ratios = []float64{}
	alives = []bool{}

	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)
}