reflect.String() Function in Golang with Examples
Last Updated :
05 May, 2020
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.String() Function in Golang is used to get the string v’s underlying value, as a string. To access this function, one needs to imports the reflect package in the program.
Syntax:
func (v Value) String() string
Parameters: This function does not accept any parameter.
Return Value: This function returns the string v’s underlying value, as a string.
Below examples illustrate the use of the above method in Golang:
Example 1:
package main
import (
"fmt"
"reflect"
)
func main() {
var k = reflect.TypeOf(0)
var e = reflect.TypeOf( "" )
fmt.Println(reflect.FuncOf([]reflect.Type{k},
[]reflect.Type{e}, false ).String())
}
|
Output:
func(int) string
Example 2:
package main
import (
"fmt"
"reflect"
)
type Struct1 struct {
Var1 string
Var2 string
Var3 float64
Var4 float64
}
func main() {
NewMap := make(map[string]*Struct1)
NewMap[ "abc" ] = &Struct1{ "abc" , "def" , 1.0, 2.0}
subvalMetric := "Var1"
for _, Value:= range NewMap {
s := reflect.ValueOf(&Value).Elem()
println(s.String())
println(s.Elem().String())
metric := s.Elem().FieldByName(subvalMetric).Interface()
fmt.Println(metric)
}
}
|
Output:
<*main.Struct1 Value>
<main.Struct1 Value>
abc
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