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Go语言如何判断是否是零值
阅读量:430 次
发布时间:2019-03-06

本文共 629 字,大约阅读时间需要 2 分钟。

通过封装IsZeroOfUnderlyingType方法判断,代码如下

package mainimport (	"fmt"	"reflect")type Person struct {	Name string	Age  int}func IsZeroOfUnderlyingType(x interface{}) bool {	return reflect.DeepEqual(x, reflect.Zero(reflect.TypeOf(x)).Interface())}func main() {	var person Person //定义一个零值	fmt.Println(IsZeroOfUnderlyingType(person)) //零值结构体,输出true	person.Name = "chenqiognhe"                 //结构体属性Name赋值	fmt.Println(IsZeroOfUnderlyingType(person)) //输出false	fmt.Println(IsZeroOfUnderlyingType(person.Age)) //Age仍是零值,输出true	person.Age = 18                                 //Age赋值	fmt.Println(IsZeroOfUnderlyingType(person.Age)) //输出false}

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