JSON / Go to JSON type mappings / Essential Go
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package main
import (
"encoding/json"
"fmt"
"io"
"log"
"os"
"text/tabwriter"
)
func printSerialized(v interface{}, w io.Writer) {
d, err := json.Marshal(v)
if err != nil {
log.Fatalf("json.Marshal failed with '%s'\n", err)
}
fmt.Fprintf(w, "%T\t%s\n", v, string(d))
}
func main() {
w := new(tabwriter.Writer)
w.Init(os.Stdout, 5, 0, 1, ' ', 0)
fmt.Fprint(w, "Go type:\tJSON value:\n")
fmt.Fprint(w, "\t\n")
printSerialized(nil, w)
printSerialized(5, w)
printSerialized(8.23, w)
printSerialized("john", w)
ai := []int{5, 4, 18}
printSerialized(ai, w)
a := []interface{}{4, "string"}
printSerialized(a, w)
d := map[string]interface{}{
"i": 5,
"s": "foo",
}
printSerialized(d, w)
s := struct {
Name string
Age int
}{
Name: "John",
Age: 37,
}
printSerialized(s, w)
w.Flush()
}
Go
INFO