How to Represent a JSON Array with Dynamic Keys in a Go Struct?

Go Struct Representation for JSON Array with Dynamic Keys

Consider a JSON file containing an array:

[
  {"a" : "1"},
  {"b" : "2"},
  {"c" : "3"}
]

Despite attempting to parse it as a map of strings to strings, an error arises:

json: cannot unmarshal array into Go value of type main.data

To resolve this, we need a Go structure that mirrors the JSON array format.

The correct approach can be found here: https://play.golang.org/p/8nkpAbRzAD

type mytype []map[string]string

func main() {
    var data mytype
    file, err := ioutil.ReadFile("test.json")
    if err != nil {
        log.Fatal(err)
    }
    err = json.Unmarshal(file, &data)
    if err != nil {
        log.Fatal(err)
    }
    fmt.Println(data)
}

This definition declares mytype as a slice of maps, aligning with the structure of the JSON array. It allows for the correct parsing and representation of the JSON data in a Go struct.

The above is the detailed content of How to Represent a JSON Array with Dynamic Keys in a Go Struct?. For more information, please follow other related articles on the PHP Chinese website!