Omitting empty fields when encoding
Omitting empty fields from JSON encoding usually saves space and makes the JSON more reader-friendly. However, what is meant by “empty” should be clear.
How to do it...
Use the ,omitempty JSON tag to omit empty string values, zero integer/floating-point values, zero time.Duration values, and nil pointer values.
The ,omitempty tag does not work for time.Time values. Use *time.Time and set it to nil to omit empty time values:
type Config struct {
...
Type string `json:"type,omitempty"`
IntValue int `json:"intValue,omitempty"`
FloatValue float64 `json:"floatValue,omitempty"`
When *time.Time `json:"when...
