go语言type使用小技巧

 

import "fmt"

type Rank int

const (
        Rank001 Rank = iota
        Rank002
        Rank003
        Rank004
)

var rewards = [...]string{
        "奖励1","奖励2","奖励3","奖励4",
}


func (r Rank) getReward() string {
        return rewards[r]
}

func main() {

        fmt.Println(Rank003.getReward())
}

通过这样的方式，灵活的将排名与奖励对应，并且“面向对象”，将排名，这个int类型声明为排名，并为其添加成员函数。常规方式在C/C++，Java中，就直接通过2个以维数组惊醒处理，但相对而言，Go语言这种方式，真的很赞！

go time/time.go 中：

   108	type Weekday int
   109	
   110	const (
   111		Sunday Weekday = iota
   112		Monday
   113		Tuesday
   114		Wednesday
   115		Thursday
   116		Friday
   117		Saturday
   118	)
   119	
   120	var days = [...]string{
   121		"Sunday",
   122		"Monday",
   123		"Tuesday",
   124		"Wednesday",
   125		"Thursday",
   126		"Friday",
   127		"Saturday",
   128	}
   129	
   130	// String returns the English name of the day ("Sunday", "Monday", ...).
   131	func (d Weekday) String() string { return days[d] }