Golang : Clean formatting/indenting or pretty print JSON result

Problem:

Your Golang program is producing JSON result in a single line that looks like this :

["apple","orange","durian","pear"]

but you want to make the result human readable/clean formatted/indented or pretty print. How to do that?

Solution:

Instead of using json.Marshal() function, use json.MarshalIndent() function instead.

Example:

 package main

 import (
  "encoding/json"
  "fmt"
  "strings"
 )

 func main() {

  str := "apple orange durian pear"

  // turn to slice
  strSlice := strings.Fields(str)

  fmt.Println("Slice : ", strSlice)

  jsonPrettyPrint, _ := json.MarshalIndent(strSlice, "", "  ")

  fmt.Println("nicely indented/formatted JSON : \n", string(jsonPrettyPrint))

  jsonWithOutIndent, _ := json.Marshal(strSlice)

  fmt.Println("non-indented JSON : \n", string(jsonWithOutIndent))

 }

output:

Slice : [apple orange durian pear]

nicely indented/formatted JSON :

[

"apple",

"orange",

"durian",

"pear"

]

non-indented JSON :

["apple","orange","durian","pear"]