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  • 44_类型转换

    /*

    comma-ok断言:

    Go语言里面有一个语法,可以直接判断是否是该类型的变量:

    value, ok = element.(T),

    这里value就是变量的值,ok是一个bool类型,element是interface变量,

    T是断言的类型

    */

    package main
    
    
    import "fmt"
    
    
    type Elementer interface{}
    type Person struct {
    	name string
    	age  int
    }
    
    
    func main() {
    	var list []Elementer = make([]Elementer, 3) //空接口类型
    
    
    	list[0] = 1
    	list[1] = "ads"
    	list[2] = Person{"mike", 12}
    
    
    	for index, element := range list {
    		if value, ok := element.(int); ok == true {
    			fmt.Printf("list[%d] is an int and its value is %d
    ", index, value)
    
    
    		} else if value, ok := element.(string); ok == true {
    			fmt.Printf("list[%d] is an int and its value is %s
    ", index, value)
    
    
    		} else if value, ok := element.(Person); ok == true {
    			fmt.Printf("list[%d] is an int and its value is [%s,%d]
    ", index, value.name, value.age)
    		}
    	}
    }
    每天的价值就是不停息的前进!!!
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  • 原文地址:https://www.cnblogs.com/zhaopp/p/11565533.html
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