Go language provides inbuilt support implementation of run-time reflection and allowing a program to manipulate objects with arbitrary types with the help of reflect package. The reflect.Zero() Function in Golang is used to get the Value representing the zero value for the specified type. To access this function, one needs to imports the reflect package in the program.
Syntax:
func Zero(typ Type) ValueParameters: This function takes the following parameters:
- typ : This parameter is the Type.
Return Value: This function returns the Value representing the zero value for the specified type.
Below examples illustrate the use of the above method in Golang:
Example 1:
// Golang program to illustrate // reflect.Zero() Function package main import ( "fmt"
"reflect"
) func main() { s := struct { A int }{0}
field := reflect.ValueOf(s).Field(0)
fmt.Println(field.Interface())
// use of Zero() method
fmt.Println(reflect.Zero(field.Type()))
fmt.Println(reflect.DeepEqual(field.Interface(), reflect.Zero(field.Type())))
} |
Output:
0 0 false
Example 2:
// Golang program to illustrate // reflect.Zero() Function package main import ( "fmt"
"reflect"
) func main() { s := struct { A int }{0}
field := reflect.ValueOf(s).Field(0)
fmt.Println(field.Interface())
// use of Zero() method
fmt.Println(reflect.Zero(field.Type()))
fmt.Println(reflect.TypeOf(field.Interface()))
// use of Zero() method
fmt.Println(reflect.TypeOf(reflect.Zero(field.Type())))
// use of Zero() method
fmt.Println(reflect.DeepEqual(field.Interface(),
reflect.Zero(field.Type())))
fmt.Println(reflect.DeepEqual(field.Interface(),
int (reflect.Zero(field.Type()).Int())))
fmt.Println(reflect.DeepEqual(s, struct { A int }{} ))
fmt.Println(reflect.DeepEqual(s, struct { A int }{0} ))
} |
Output:
0 0 int reflect.Value false true true true