function for converting a struct to map in Golang

From struct to map[string]interface{}

package main

import (
    "fmt"
    "encoding/json"
)

type MyData struct {
    One   int
    Two   string
    Three int
}

func main() {   
    in := &MyData{One: 1, Two: "second"}

    var inInterface map[string]interface{}
    inrec, _ := json.Marshal(in)
    json.Unmarshal(inrec, &inInterface)

    // iterate through inrecs
    for field, val := range inInterface {
            fmt.Println("KV Pair: ", field, val)
    }
}

go playground here

I also had need for something like this. I was using an internal package which was converting a struct to a map. I decided to open source it with other struct based high level functions. Have a look:

https://github.com/fatih/structs

It has support for:

• Convert struct to a map
• Extract the fields of a struct to a []string
• Extract the values of a struct to a []values
• Check if a struct is initialized or not
• Check if a passed interface is a struct or a pointer to struct

You can see some examples here: http://godoc.org/github.com/fatih/structs#pkg-examples For example converting a struct to a map is a simple:

type Server struct {
    Name    string
    ID      int32
    Enabled bool
}

s := &Server{
    Name:    "gopher",
    ID:      123456,
    Enabled: true,
}

// => {"Name":"gopher", "ID":123456, "Enabled":true}
m := structs.Map(s)

The structs package has support for anonymous (embedded) fields and nested structs. The package provides to filter certain fields via field tags.