var i []interface{}
i = append(i, 10, 3.14, "aaa", demo15)
for _, v := range i {
    if data, ok := v.(int); ok {
        fmt.Println("整型數(shù)據(jù)：", data)
    } else if data, ok := v.(float64); ok {
        fmt.Println("浮點(diǎn)型數(shù)據(jù)：", data)
    } else if data, ok := v.(string); ok {
        fmt.Println("字符串?dāng)?shù)據(jù)：", data)
    } else if data, ok := v.(func()); ok {
        //函數(shù)調(diào)用
        data()
    }
}

2. switch測(cè)試

var i []interface{}
i = append(i, 10, 3.14, "aaa", demo15)
for _,data := range i{
    switch value:=data.(type) {
    case int:
        fmt.Println("整型",value)
    case float64:
        fmt.Println("浮點(diǎn)型",value)
    case string:
        fmt.Println("字符串",value)
    case func():
        fmt.Println("函數(shù)",value)
    }
}

類型斷言

if判斷

package main
import "fmt"
type Student struct {
	name string
	id   int
}
func main() {
	i := make([]interface{}, 3)
	i[0] = 1                    //int
	i[1] = "hello go"           //string
	i[2] = Student{"mike", 666} //Student
	//類型查詢，類型斷言
	//第一個(gè)返回下標(biāo)，第二個(gè)返回下標(biāo)對(duì)應(yīng)的值， data分別是i[0], i[1], i[2]
	for index, data := range i {
		//第一個(gè)返回的是值，第二個(gè)返回判斷結(jié)果的真假
		if value, ok := data.(int); ok == true {
			fmt.Printf("x[%d] 類型為int, 內(nèi)容為%d\n", index, value)
		} else if value, ok := data.(string); ok == true {
			fmt.Printf("x[%d] 類型為string, 內(nèi)容為%s\n", index, value)
		} else if value, ok := data.(Student); ok == true {
			fmt.Printf("x[%d] 類型為Student, 內(nèi)容為name = %s, id = %d\n", index, value.name, value.id)
		}
	}
}

Switch判斷

package main
import "fmt"
type Student struct {
	name string
	id   int
}
func main() {
	i := make([]interface{}, 3)
	i[0] = 1                    //int
	i[1] = "hello go"           //string
	i[2] = Student{"mike", 666} //Student
	//類型查詢，類型斷言
	for index, data := range i {
		switch value := data.(type) {
		case int:
			fmt.Printf("x[%d] 類型為int, 內(nèi)容為%d\n", index, value)
		case string:
			fmt.Printf("x[%d] 類型為string, 內(nèi)容為%s\n", index, value)
		case Student:
			fmt.Printf("x[%d] 類型為Student, 內(nèi)容為name = %s, id = %d\n", index, value.name, value.id)
		}

	}
}

以上就是GO語(yǔ)言類型查詢類型斷言示例解析的詳細(xì)內(nèi)容，更多關(guān)于GO類型查詢類型斷言的資料請(qǐng)關(guān)注腳本之家其它相關(guān)文章！

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