main.go 源码
// 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)
}
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