Go - Writing Programs in Go - 配列からスライスを作成

Go Systems Programming:
Master Linux and Unix
system level programming with Go
楽天ブックス 紀伊國屋書店

開発環境

• macOS Catalina - Apple (OS)
• Emacs (Text Editor)
• Windows 10 Pro (OS)
• Visual Studio Code (Text Editor)
• Go (プログラミング言語)

Go Systems Programming: Master Linux and Unix system level programming with Go (Mihalis Tsoukalos(著)、Packt Publishing)のChapter 2(Writing Programs in Go)、Exercises 8.の解答を求めてみる。

コード

package main

import "fmt"

func p(a [5]int, s []int) {
 fmt.Printf("%T %[1]v %v %v\n", s, len(s), cap(s))
 fmt.Printf("%T %[1]v %v %v\n", a, len(a), cap(a))
}
func main() {
 a := [5]int{1, 2, 3, 4, 5}
 s := a[:]
 p(a, s)
 s[1] = 10
 p(a, s)
 s = append(s, 11)
 p(a, s)
}

入出力結果(Zsh、PowerShell、Terminal)

% go run main.go
[]int [1 2 3 4 5] 5 5
[5]int [1 2 3 4 5] 5 5
[]int [1 10 3 4 5] 5 5
[5]int [1 10 3 4 5] 5 5
[]int [1 10 3 4 5 11] 6 10
[5]int [1 10 3 4 5] 5 5
%