Mastering Go - Second Edition

Saving JSON data

In this subsection, you will learn how to write JSON data. The utility that will be presented in three parts is called writeJSON.go and it will write to standard output (os.Stdout), which means that it will write on the terminal screen.

The first part of writeJSON.go is as follows:

package main 
 
import ( 
    "encoding/json" 
    "fmt" 
    "os" 
) 
 
type Record struct { 
    Name    string 
    Surname string 
    Tel     []Telephone 
} 
 
type Telephone struct { 
    Mobile bool 
    Number string 
} 

The second part of writeJSON.go is the following:

func saveToJSON(filename *os.File, key interface{}) { 
    encodeJSON := json.NewEncoder(filename) 
   err := encodeJSON.Encode(key) 
    if err != nil { 
        fmt.Println(err) 
        return 
    } 
} 

The saveToJSON() function does all the work for us as it creates ...