Issue
i have simple struct and reciver i try to set the map with the struct and then call reciver
Like that :
package main
import (
"fmt"
)
type myStruct struct {
FirstName string
LastName string
}
func (m *myStruct) GetFirstName() string {
return m.FirstName
}
func (m *myStruct) GetLastName() string {
return m.LastName
}
func main() {
testMyStruct := myStruct {
FirstName: "x1",
LastName: "x2",
}
myMapStruct["test2"] = testMyStruct
fmt.Println(myMapStruct["test2"].GetFirstName())
}
Im Getting this error:
cannot call pointer method getFirstName on myStruct
Why i can call the reciver method from the map ?
Solution
As you are passing a receiver pointer ,you have to use pointer to the struct to call it ,Please look at the below code
package main
import (
"fmt"
)
type myStruct struct {
FirstName string
LastName string
}
func (m *myStruct) GetFirstName() string {
return m.FirstName
}
func (m *myStruct) GetLastName() string {
return m.LastName
}
func main() {
testMyStruct := &myStruct {
FirstName: "x1",
LastName: "x2",
}
myMapStruct:=make(map[string]*myStruct)
myMapStruct["test2"] = testMyStruct
fmt.Println(myMapStruct["test2"].GetFirstName())
}
See working here
or You can use like below if passing receiver as value
package main
import (
"fmt"
)
type myStruct struct {
FirstName string
LastName string
}
func (m myStruct) GetFirstName() string {
return m.FirstName
}
func (m myStruct) GetLastName() string {
return m.LastName
}
func main() {
testMyStruct := myStruct {
FirstName: "x1",
LastName: "x2",
}
myMapStruct:=make(map[string]myStruct)
myMapStruct["test2"] = testMyStruct
fmt.Println(myMapStruct["test2"].GetFirstName())
}
Answered By – Shubh
Answer Checked By – Clifford M. (GoLangFix Volunteer)