gistfile1.txt

package main

import (
  "fmt"
  "gopkg.in/yaml.v2"
  "io/ioutil"
)


func subtraverse(data *interface{}) {
  d := (*data).(map[interface{}]interface{})
  fmt.Println(d["title"], d["body"])
  if d["subs"] != nil {
    fmt.Println("Subs!")
    s := d["subs"].([]interface{})
    for _, e := range(s) {
      //fmt.Println(e)
      subtraverse(&e)
    } 
  }
}

func traverse(data *map[interface{}]interface{}) {
  //fmt.Println((*data)["subs"])
  if (*data)["subs"] != nil {
    fmt.Println("Found Subs")
    s := (*data)["subs"].([]interface{})
    //fmt.Println(s)
    for _, e := range(s) {
      //fmt.Println(e)
      subtraverse(&e)
    }
  }
}

func main() {
  data := make(map[interface{}]interface{})
  d, err := ioutil.ReadFile("book.yaml")
  if err != nil { panic(err) }
  err = yaml.Unmarshal(d, &data)
  if err != nil { panic(err) }

  traverse(&data)
}