Golang Reflection Example

reflection.go

package main

import (
	"fmt"
	"reflect"
)

type Foo struct {
	FirstName string `tag_name:"tag 1"`
	LastName  string `tag_name:"tag 2"`
	Age       int    `tag_name:"tag 3"`
}

func (f *Foo) reflect() {
	val := reflect.ValueOf(f).Elem()

	for i := 0; i < val.NumField(); i++ {
		valueField := val.Field(i)
		typeField := val.Type().Field(i)
		tag := typeField.Tag

		fmt.Printf("Field Name: %s,\t Field Value: %v,\t Tag Value: %s\n", typeField.Name, valueField.Interface(), tag.Get("tag_name"))
	}
}

func main() {
	f := &Foo{
		FirstName: "Drew",
		LastName:  "Olson",
		Age:       30,
	}

	f.reflect()
}

Nice snippet, thanks!

Thank you very much! Just needed it.

Does the reflection logic change if foo is passed in as an empty interface? interface{}?

Thanks!

Thank you! 👍

很好的例子，感谢作者！
thanks to the author,A good example!

thanks @drewolson, and @lenw for posting the snippet

yeah this helped me a lot!!

This is a good example. Thanks.

good example. tks

This is a good example. It helped me!

So nice example. Hah, solve my problem perfectly

Line 15: Can panic.
For zero Value.
See https://golang.org/pkg/reflect/#ValueOf
https://play.golang.org/p/AcFBIdQeAhi

This is a very good example of reflection. Thank you

Thanks!!!

It is what exactly I wanted. :) It helps to save my time a lot. Thanks.

nice example!!!

Thank you! It's helpful for me!

Thank You :)

Great, thanks!