Golang : How to get struct field and value by name
In Go, there are times when we need to find out the value of a field in a given structure base on the name of the field. This tutorial will show how to use the reflect
package to find out the associated value from the field name.
package main
import (
"fmt"
"reflect"
)
type Employee struct {
Name string
Age int
Job string
}
func getFieldString(e *Employee, field string) string {
r := reflect.ValueOf(e)
f := reflect.Indirect(r).FieldByName(field)
return f.String()
}
func getFieldInteger(e *Employee, field string) int {
r := reflect.ValueOf(e)
f := reflect.Indirect(r).FieldByName(field)
return int(f.Int())
}
func main() {
e := Employee{"Adam", 36, "CEO"}
fmt.Println(getFieldString(&e, "Name"))
fmt.Println(getFieldInteger(&e, "Age"))
fmt.Println(getFieldString(&e, "Job"))
}
Output :
Adam
36
CEO
Recommended reading on how to use reflect :
http://blog.golang.org/laws-of-reflection
References :
https://www.socketloop.com/tutorials/golang-print-out-struct-values-in-string-format
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
+12.7k Golang : How to pass map to html template and access the map's elements
+19.6k Golang : Create and resolve(read) symbolic links
+12.9k Golang : concatenate(combine) strings
+7k Golang : Multiplexer with net/http and map
+4.1k Golang : Check if a word is countable or not
+7.2k Golang : Metaprogramming example of wrapping a function
+8.2k Golang : Read file with ioutil
+5.2k Golang & Javascript : How to save cropped image to file on server
+9.4k Golang : Underscore string example
+11.3k Golang : Sort and reverse sort a slice of bytes
+10.6k Golang : Convert(cast) bigint to string
+11.4k Swift : Convert (cast) Int or int32 value to CGFloat