sanntid.go

package main

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/http"
)

type StopVisits struct {
	MonitoredStopVisit map[int]MonitoredStopVisit
}

type MonitoredStopVisit struct {
	MonitoringRef           string
	RecordedAtTime          string
	MonitoredVehicleJourney MonitoredVehicleJourney
}

type MonitoredVehicleJourney struct {
	MonitoredCall MonitoredCall
}

type MonitoredCall struct {
	AimedArrivalTime      string
	AimedDepartureTime    string
	ExpectedArrivalTime   string
	ExpectedDepartureTime string
	VehicleAtStop         bool
}

func main() {
	resp, _ := http.Get("http://reisapi.ruter.no/stopvisit/getdepartures/3011484")

	defer resp.Body.Close()
	body, _ := ioutil.ReadAll(resp.Body)

	stops := make([]MonitoredStopVisit, 0)
	json.Unmarshal(body, &stops)

	fmt.Printf("%#v", stops[0].MonitoredVehicleJourney.MonitoredCall.ExpectedArrivalTime)
}

Probably none. There is some information on it here: http://stackoverflow.com/questions/25543520/golang-declare-slice-or-make-slice

So I guess var stops [] MonitoredStopVisit would be preferable, as it doesn't allocate any memory until it actually gets data? But I guess in reality, it doesn't really matter (at least in this case) as it will always be populated with data?