how to Preserving key order by json parse ?

[leeonsoft]

package main

import (
"fmt"
"github.com/Jeffail/gabs"
)

func main() {
jsonStr := {"b":"dddd","a":"111"}
d, _ := gabs.ParseJSON([]byte(jsonStr))
fmt.Println(d.String())
}
// output {"a":"111","b":"dddd"} how to get result : {"b":"dddd","a":"111"} ???

[mihaitodor]

Key order is undefined in JSON and, because Go uses maps to hold JSON objects, the order will not be preserved. Details here: golang/go#27179. When marshalling to string, the keys will be sorted lexicographically:

Map values encode as JSON objects. The map's key type must either be a string, an integer type, or implement encoding.TextMarshaler. The map keys are sorted and used as JSON object keys by applying the following rules, subject to the UTF-8 coercion described for string values above:

keys of any string type are used directly
encoding.TextMarshalers are marshaled
integer keys are converted to strings