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
+12.1k Golang : error parsing regexp: invalid or unsupported Perl syntax
+9.1k Golang : Convert file content to Hex
+5.6k Unix/Linux : How to get own IP address ?
+6.3k Golang : Create zip/ePub file without compression(use Store algorithm)
+17.1k Golang : Logging with logrus
+8.9k Golang : Simple Jawi(Yawi) to Rumi(Latin/Romanize) converter
+5.9k Golang : Levenshtein distance example
+21.6k Golang : Strings to lowercase and uppercase example
+4k HTTP common errors and their meaning explained
+28.9k Golang : Calculate percentage change of two values
+22k Find and replace a character in a string in Go
+9.2k Golang : How to get quoted string into another string?