golang json float
type KeepZero float64
func (f KeepZero) MarshalJSON() ([]byte, error) {
if float64(f) == float64(int(f)) {
return []byte(strconv.FormatFloat(float64(f), 'f', 1, 32)), nil
}
return []byte(strconv.FormatFloat(float64(f), 'f', -1, 32)), nil
}
type Pt struct {
Value KeepZero
}
func main() {
data, err := json.Marshal(Pt{40.0})
fmt.Println(string(data), err)
}