How do you loop through the fields in a Golang struct to get and set values in an extensible way?

Question

I have a struct Person.

type Person struct {
    Firstname string       
    Lastname  string       
    Years     uint8       
}

Then I have t

Answer 1

You should use a map[string]interface{} instead, gonna be much faster (although still not as fast as you used the proper logic with actual structs).

package main

import "fmt"

type Object map[string]interface{}

var m = Object{
    "Firstname": "name",
    "Lastname":  "",
    "years":     uint8(10),
}

func main() {
    var cp = Object{}
    for k, v := range m {
        if s, ok := v.(string); ok && s != "" {
            cp[k] = s
        } else if ui, ok := v.(uint8); ok {
            cp[k] = ui
        }
    }
    fmt.Printf("%#v\n", cp)
}