reflect.Interface() Function in Golang with Examples
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.Interface() Function in Golang is used to get the v’s current value as an interface{}. To access this function, one needs to imports the reflect package in the program.
Syntax:
func (v Value) Interface() (i interface{})
Parameters: This function accept only one parameter.
- i : This parameter is the interface{} type
Return Value: This function returns v’s current value as an interface{}.
Below examples illustrate the use of the above method in Golang:
Example 1:
package main
import (
"fmt"
"reflect"
)
func main() {
t := reflect.TypeOf(5)
arr := reflect.ArrayOf(4, t)
inst := reflect.New(arr).Interface().(*[4] int )
for i := 1; i <= 4; i++ {
inst[i-1] = i*i
}
fmt.Println(inst)
}
|
Output:
&[1 4 9 16]
Example 2:
package main
import (
"fmt"
"reflect"
)
func main() {
var str []string
var v reflect.Value = reflect.ValueOf(&str)
v = v.Elem()
v = reflect.Append(v, reflect.ValueOf( "a" ))
v = reflect.Append(v, reflect.ValueOf( "b" ))
v = reflect.Append(v, reflect.ValueOf( "c" ), reflect.ValueOf( "j, k, l" ))
fmt.Println( "Our value is a type of :" , v.Kind())
vSlice := v.Slice(0, v.Len())
vSliceElems := vSlice.Interface()
fmt.Println( "With the elements of : " , vSliceElems)
}
|
Output:
Our value is a type of : slice
With the elements of : [a b c j, k, l]
Last Updated :
03 May, 2020
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