go結構體巢狀的切片陣列
package main import ( "fmt" ) type XCDataStu struct { Id int `json:"id" xorm:"id"` Name string `json:"name" xorm:"name"` } type XCDataStu1 struct { Id int `json:"id" xorm:"id"` Str1 string `json:"str1" xorm:"str1"` Db1 string `json:"db1" xorm:"db1"` Device_type string `json:"Device_type" xorm:"Device_type"` DeviceTypeName string `json:"DeviceTypeName"` } type XCDataStuAll struct {//結構體巢狀 XCDataStuinall XCDataStu XCDataStu1inall XCDataStu1 } func main() { /*1*/ xcData := []XCDataStu{ XCDataStu{Id: 758, Name: "David758"}, XCDataStu{Id: 759, Name: "David759"}, } /*2*/ xcdataall := make([]XCDataStuAll, len(xcData)) /*xcdataall[0]={ XCDataStu{Id: 758, Name: "David758"}, XCDataStu1{Id: 0, Str1: "dsa", Db1: "dsa", Device_type: "fhls", DeviceTypeName: "dasf"}}*/ fmt.Println(len(xcData)) fmt.Println(xcData[0]) fmt.Println(xcData[1]) i := 0 for ; i < 2; i++ { xcdataall[i].XCDataStuinall.Id = xcData[i].Id xcdataall[i].XCDataStuinall.Name = xcData[i].Name } fmt.Println(xcdataall) }
結構體切片:
- 可以直接宣告時初始化,如程式中的1
- 可以用make,但是必須給定長度,否則不能使用下標進行賦值。如程式中的2
var xcdataall []XCDataStuAll
for ; i < 2; i++ {
xcdataall[i].XCDataStuinall.Id = xcData[i].Id
xcdataall[i].XCDataStuinall.Name = xcData[i].Name
}
程式編譯沒錯,但是最後執行後會出現panic。。。
panic: runtime error: index out of range