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
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+8.9k Golang : Compare files modify date example
+8.4k Golang : ffmpeg with os/exec.Command() returns non-zero status
+14k Golang : rune literal not terminated error
+3.7k MariaDB/MySQL : How to get version information
+17.2k Golang : Send email with attachment
+24.2k Golang : How to read integer value from standard input ?
+18.2k Golang : Delete item from slice based on index/key position
+16.2k Golang : Parse date string and convert to dd-mm-yyyy format
+6.1k Web : How to see your website from different countries?
+11.6k Golang : Transform comma separated string to slice example
+18.3k Golang : Count JSON objects and convert to slice/array
+4.8k Linux : Disable and enable IPv4 forwarding