How to produce JSON with sorted keys in Go?

Question

In python you can produce JSON with keys in sorted order by doing

import json
print json.dumps({\'4\': 5, \'6\': 7}, sort_keys=True, indent=4, separators=(\'         


        

Answer 1

The json package always orders keys when marshalling. Specifically:

• Maps have their keys sorted lexicographically

• Structs keys are marshalled in the order defined in the struct

The implementation lives here ATM:

• http://golang.org/src/pkg/encoding/json/encode.go?#L359