英文:
How can I dereference the struct of this pointer
问题
我已经翻译了你提供的代码部分，以下是翻译的结果：
package main
import (
"context"
"fmt"
"log"
"time"
"github.com/kr/pretty"
"googlemaps.github.io/maps"
)
func main() {
api_key := "xxxxxxx"
c, err := maps.NewClient(maps.WithAPIKey(api_key))
if err != nil {
log.Fatalf("致命错误：%s", err)
}
r := &maps.DistanceMatrixRequest{
Origins: []string{"达曼"},
Destinations: []string{"利雅得"},
ArrivalTime: (time.Date(1, time.September, 1, 0, 0, 0, 0, time.UTC)).String(),
}
resp, err := c.DistanceMatrix(context.Background(), r)
if err != nil {
log.Fatalf("致命错误：%s", err)
}
pretty.Println(resp)
}
获取的输出为：
&maps.DistanceMatrixResponse{
OriginAddresses: {"沙特阿拉伯达曼"},
DestinationAddresses: {"沙特阿拉伯利雅得"},
Rows: {
{
Elements: {
&maps.DistanceMatrixElement{
Status: "OK",
Duration: 14156000000000,
DurationInTraffic: 0,
Distance: maps.Distance{HumanReadable:"410 公里", Meters:409773},
},
},
},
},
}
根据上面的输出，我需要打印出 Duration 和 Distance.HumanReadable，即我需要获取：14156000000000 和 410 公里
因此，我可以将行程持续时间转换为小时和分钟，如下所示：
value := 14156000000000 // value 是 int 类型
d2 := time.Duration(value)
hr := int64(d2 / time.Hour)
min := int64(d2 / time.Minute)
m := min - hr*60
fmt.Printf("所需时间为：%d 小时 %d 分钟", hr, m)
我尝试了以下代码：
x := resp.Rows[0].Elements
fmt.Println("持续时间：", x)
但输出结果为：
持续时间： [0xc000192840]
英文:
I've the below code using Google Map Matrix:
package main
import (
"context"
"fmt"
"log"
"time"
"github.com/kr/pretty"
"googlemaps.github.io/maps"
)
func main() {
api_key := "xxxxxxx"
c, err := maps.NewClient(maps.WithAPIKey(api_key))
if err != nil {
log.Fatalf("fatal error: %s", err)
}
r := &maps.DistanceMatrixRequest{
Origins: []string{"Dammam"},
Destinations: []string{"Riyadh"},
ArrivalTime: (time.Date(1, time.September, 1, 0, 0, 0, 0, time.UTC)).String(),
}
resp, err := c.DistanceMatrix(context.Background(), r)
if err != nil {
log.Fatalf("fatal error: %s", err)
}
pretty.Println(resp)
}
And getting the output as:
&maps.DistanceMatrixResponse{
OriginAddresses: {"Dammam Saudi Arabia"},
DestinationAddresses: {"Riyadh Saudi Arabia"},
Rows: {
{
Elements: {
&maps.DistanceMatrixElement{
Status: "OK",
Duration: 14156000000000,
DurationInTraffic: 0,
Distance: maps.Distance{HumanReadable:"410 km", Meters:409773},
},
},
},
},
}
From the output above, I need to print the Duration and the Distance.HumanReadable, i.e.
I need to get: 14156000000000 and 410 km
So I can convert the trip duration to hrs and minutes as:
value := 14156000000000 // value is of type int
d2 := time.Duration(value)
hr := int64(d2 / time.Hour)
min := int64(d2 / time.Minute)
m := min - hr*60
fmt.Printf("Time required is: %d H and %d M", hr, m)
I tried:
x := resp.Rows[0].Elements
fmt.Println("Duration:", x)
But the output was:
Duration: [0xc000192840]
答案1
得分: 2
resp.Rows[0].Elements 是一个切片([]*DistanceMatrixElement)，所以你需要指定你想要输出的元素。我猜你想要的是：
x := resp.Rows[0].Elements[0].Duration
fmt.Println("Duration:", x)
英文:
resp.Rows[0].Elements is a slice ([]*DistanceMatrixElement) so you will need to specify which element you wish to output. I'd guess that you want:
x := resp.Rows[0].Elements[0].Duration
fmt.Println("Duration:", x)
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