json - How to recognize void value and unspecified field when unmarshaling in Go?

Question

I would like to know if it's possible to differenciate a void value and an unspecified field value.

Here is an example:

var jsonBlob = []byte(`[
    {"Name": "A", "Description": "Monotremata"},
    {"Name": "B"},
    {"Name": "C", "Description": ""}
]`)

type Category struct {
    Name  string
    Description string
}

var categories []Category
err := json.Unmarshal(jsonBlob, &categories)

if err != nil {
    fmt.Println("error:", err)
}
fmt.Printf("%+v", categories)

Also available here: https://play.golang.org/p/NKObQB5j4O

Output:

[{Name:A Description:Monotremata} {Name:B Description:} {Name:C Description:}]

So in this example is it possible to differentiate the description from the category B from the category C?

I just want to be able to differentiate them to have different behavior in the program.

Answer 1

Waitting for answers