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
+11.6k Golang : Get the IPv4 and IPv6 addresses for a specific network interface
+5.4k Golang : Test if an input is an Armstrong number example
+3.9k Javascript : Generate random key with specific length
+6.2k Golang : Changing a RGBA image number of channels with OpenCV
+5.8k Golang : Temperatures conversion example
+12.7k Golang : Get current URL example
+1.8k Java : Get FX sentiment from website example
+33.7k Golang : Get hardware information such as disk, memory and CPU usage
+4.7k Golang : alternative to os.Exit() function
+5.9k Golang : Get SPF and DMARC from email headers to fight spam
+12.2k Golang : Check if a string contains multiple sub-strings in []string?
+2.7k Nginx and PageSpeed build from source CentOS example