Go - labeling data - Maps - for...range loops with maps, random order

Head First Go
楽天ブックス 紀伊國屋書店

開発環境

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

Head First Go (Jay McGavren(著)、O'Reilly Media)のChapter 7(labeling data - Maps)、Code Magnets(226)の解答を求めてみる。

コード

package main

import "fmt"

func main() {
 ranks := map[string]int{"gold": 1, "silver": 2, "bronze": 3}
 for i := 0; i < 5; i++ {
  for medal, rank := range ranks {
   fmt.Printf("The %s medal's rank is %d\n", medal, rank)
  }
  fmt.Println()
 }
}

入出力結果(Bash、cmd.exe(コマンドプロンプト)、Terminal)

$ go run sample3.go
The bronze medal's rank is 3
The gold medal's rank is 1
The silver medal's rank is 2

The gold medal's rank is 1
The silver medal's rank is 2
The bronze medal's rank is 3

The bronze medal's rank is 3
The gold medal's rank is 1
The silver medal's rank is 2

The silver medal's rank is 2
The bronze medal's rank is 3
The gold medal's rank is 1

The gold medal's rank is 1
The silver medal's rank is 2
The bronze medal's rank is 3

$