将结构体中的字符串转换为 []string
我有一个 struct
如下:
type TourData struct {
ArtistID int //artist ID
RelationID string //key for relations
City string
Country string
TourDates []string
}
type MyRelation struct {
ID int `json:"id"`
DatesLocations map[string][]string `json:"datesLocations"`
}
其中包含来自 csv 文件的数据:
1,nagoya-japan,Nagoya,Japan,
1,penrose-new_zealand,Penrose,New_Zealand,
1,dunedin-new_zealand,Dunedin,New_Zealand,
2,playa_del_carmen-mexico,Playa Del Carmen,Mexico,
2,papeete-french_polynesia,Papeete,French_Polynesia,
MyRelations 是从 API 填充的,其中包含:
"index": [
{
"id": 1,
"datesLocations": {
"dunedin-new_zealand": [
"10-02-2020"
],
"nagoya-japan": [
"30-01-2019"
],
"penrose-new_zealand": [
"07-02-2020"
]
}
},
{
"id": 2,
"datesLocations": {
"papeete-french_polynesia": [
"16-11-2019"
],
"playa_del_carmen-mexico": [
"05-12-2019",
"06-12-2019",
"07-12-2019",
"08-12-2019",
"09-12-2019"
]
}
}
日期来自另一个结构。我用来填充这个结构的代码如下:
var oneRecord TourData
var allRecords []TourData
for _, each := range csvData {
oneRecord.ArtistID, _ = strconv.Atoi(each[0])
oneRecord.RelationID = each[1]
oneRecord.City = each[2]
oneRecord.Country = each[3]
oneRecord.TourDates = Relations.Index[oneRecord.ArtistID-1].DatesLocations[each[1]]
allRecords = append(allRecords, oneRecord)
}
jsondata, err := json.Marshal(allRecords) // convert to JSON
json.Unmarshal(jsondata, &TourThings)
我需要将所有 1 组合在一起,然后是 2 等。我想创建另一个结构,并从这个结构中填充,但运气不佳 - 有什么想法吗?
为了澄清,我想说 TourData.City 等于:
[Nagoya,Penrose,Dunedin]
[Playa Del Carmen, Papeete]
目前,如果我要打印 TourData[0].City 我会得到 Nagoya。
我尝试创建另一个结构体,从 TourData 结构体中填充以下字段:
type TourDataArrays struct {
ArtistID int
City []string
Country []string
TourDates [][]string
}
然后使用下面的代码填充该结构体:
var tourRecord TourDataArrays
var tourRecords []TourDataArrays
for i := 0; i < len(Relations.Index); i++ {
for j := 0; j < len(allRecords); j++ {
if allRecords[i].ArtistID == i+1 {
tourRecord.City = append(tourRecord.City, allRecords[j].City)
}
}
tourRecords = append(tourRecords, tourRecord)
}
但是,这会将所有城市添加到一个数组中,即
[Nagoya、Penrose、Dunedin、Playa Del Carmen、帕皮提]。
I have a struct
as below:
type TourData struct {
ArtistID int //artist ID
RelationID string //key for relations
City string
Country string
TourDates []string
}
type MyRelation struct {
ID int `json:"id"`
DatesLocations map[string][]string `json:"datesLocations"`
}
which contains this data from a csv file:
1,nagoya-japan,Nagoya,Japan,
1,penrose-new_zealand,Penrose,New_Zealand,
1,dunedin-new_zealand,Dunedin,New_Zealand,
2,playa_del_carmen-mexico,Playa Del Carmen,Mexico,
2,papeete-french_polynesia,Papeete,French_Polynesia,
MyRelations is populated from an API which contains:
"index": [
{
"id": 1,
"datesLocations": {
"dunedin-new_zealand": [
"10-02-2020"
],
"nagoya-japan": [
"30-01-2019"
],
"penrose-new_zealand": [
"07-02-2020"
]
}
},
{
"id": 2,
"datesLocations": {
"papeete-french_polynesia": [
"16-11-2019"
],
"playa_del_carmen-mexico": [
"05-12-2019",
"06-12-2019",
"07-12-2019",
"08-12-2019",
"09-12-2019"
]
}
}
The dates come from another struct. The code I have used to populate this struct is as below:
var oneRecord TourData
var allRecords []TourData
for _, each := range csvData {
oneRecord.ArtistID, _ = strconv.Atoi(each[0])
oneRecord.RelationID = each[1]
oneRecord.City = each[2]
oneRecord.Country = each[3]
oneRecord.TourDates = Relations.Index[oneRecord.ArtistID-1].DatesLocations[each[1]]
allRecords = append(allRecords, oneRecord)
}
jsondata, err := json.Marshal(allRecords) // convert to JSON
json.Unmarshal(jsondata, &TourThings)
I need to group all the 1s together then the 2s etc. I thought to create another struct, and populate from this one but not having much luck - any ideas?
To clarify I would want say TourData.City to equal:
[Nagoya,Penrose,Dunedin]
[Playa Del Carmen, Papeete]
At the moment if I was to print TourData[0].City I would get Nagoya.
I have tried creating another struct to be populated from the TourData struct with the following fields:
type TourDataArrays struct {
ArtistID int
City []string
Country []string
TourDates [][]string
}
and then populate the struct using the code below:
var tourRecord TourDataArrays
var tourRecords []TourDataArrays
for i := 0; i < len(Relations.Index); i++ {
for j := 0; j < len(allRecords); j++ {
if allRecords[i].ArtistID == i+1 {
tourRecord.City = append(tourRecord.City, allRecords[j].City)
}
}
tourRecords = append(tourRecords, tourRecord)
}
However this is adding all the cities to one array i.e
[Nagoya, Penrose, Dunedin, Playa Del Carmen, Papeete].
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如果我正确理解您的要求,您还需要将 city 声明为字符串数组。 (还有与之相配的国家/地区)。
查看此解决方案: https://go.dev/play/p/osgkbfWV3c5
注意我尚未从 Json 中的一个字段中删除国家/地区的重复数据并派生出城市和国家/地区。
If I understand your requirements correctly you needed to declare city as a string array as well. (And Country to go with it).
Check out this solution : https://go.dev/play/p/osgkbfWV3c5
Note I have not deduped country and derived city and country from one field in the Json.