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()
}

For ref - http://play.golang.org/p/P9zvVJnMhR

Thanks very much for this! Very helpful.

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!