Example
json.Marshal from the package "encoding/json" encodes a value to JSON.
The parameter is the value to encode. The returned values are an array of bytes representing the JSON-encoded input (on success), and an error (on failure).
decodedValue := []string{"foo", "bar"}
// encode the value
data, err := json.Marshal(decodedValue)
// check if the encoding is successful
if err != nil {
panic(err)
}
// print out the JSON-encoded string
// remember that data is a []byte
fmt.Println(string(data))
// "["foo","bar"]"
Here's some basic examples of encoding for built-in data types:
var data []byte
data, _ = json.Marshal(1)
fmt.Println(string(data))
// 1
data, _ = json.Marshal("1")
fmt.Println(string(data))
// "1"
data, _ = json.Marshal(true)
fmt.Println(string(data))
// true
data, _ = json.Marshal(map[string]int{"London": 18, "Rome": 30})
fmt.Println(string(data))
// {"London":18,"Rome":30}
Encoding simple variables is helpful to understand how the JSON encoding works in Go. However, in the real world, you'll likely encode more complex data stored in structs.
