Programming Go (WIP)

This is a set of snippets with go code.

JSON

package main

import (
      "bufio"
      "encoding/json"
      "io"
      "fmt"
      "os"
)

type User struct {
      Id int
      Username string
}

func check(e error) {
      if e != nil {
           panic(e)
      }
}

func main() {
     user := User{1,"fred"}

     fmt.Println("Using Encoder to write json directly to Standard Output")

     enc := json.NewEncoder(os.Stdout)
     err := enc.Encode(user)
     check(err)

     fmt.Println("Using Encoder to write json directly to File user.json")

     f, err := os.Create("./user.json")
     check(err)

     fd := bufio.NewWriter(f)
     enc = json.NewEncoder(fd)
     enc.Encode(user)
     fd.Flush()

     var user_from_file User
     f, err = os.Open("./user.json")
     check(err)
     dec := json.NewDecoder(f)

     for err := dec.Decode(&user_from_file); err != nil && err != io.EOF; {
          panic(err)
     }
     fmt.Println(user_from_file.Id, user_from_file.Username)
     f.Close()
}