Golang : Convert string slice to struct and access with reflect example
Writing this down here for my own future references. Basically, what this code does is to convert a given string data slice into struct
. Pretty handy to have when processing data output from proprietary systems.
Here you go!
package main
import (
"fmt"
"log"
"reflect"
"strconv"
)
type User struct {
Id int
Username string
}
func main() {
data := [][]string{
[]string{"1", "Adam"},
[]string{"2", "Eve"},
}
// convert data string slice to struct
// such as
//user1 := &User{"1","Adam"}
//user2 := &User{"2","Eve"}
users := []*User{}
for _, v := range data {
//fmt.Println("data: ", v[0], v[1])
// convert v[0] to type integer
id, err := strconv.Atoi(v[0])
if err != nil {
log.Fatal(err, v[0])
}
user := &User{id, v[1]}
users = append(users, user)
}
// the reflect way
for i := 0; i < 2; i++ {
u := reflect.ValueOf(users[i])
id := reflect.Indirect(u).FieldByName("Id")
name := reflect.Indirect(u).FieldByName("Username")
fmt.Println(id, name)
fmt.Println("==========")
}
}
Output:
1 Adam
==========
2 Eve
==========
Happy coding!
Reference:
https://www.socketloop.com/tutorials/golang-how-to-get-struct-field-and-value-by-name
See also : Golang : How to get struct field and value by name
By Adam Ng
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