如何从变量分配结构的字段名称

Question

I am new to golang and migrating from php to golang.

I am trying to do something like below stuff, where I want field name age to get assigned from variable test. Is this possible in golang?

In php, we have provision like $$test, looking something similar in golang as well.

 package main
 import "fmt"
 // This `person` struct type has `name` and `age` fields.
 type person struct {
   name string
   age  int
 }

 func main() {

   var test = "age"     
   fmt.Println(person{name: "Alice",test: 30})

 } 

This is just sample code replicating my use case.

Answer 1

You have three options, in rough order of preference:

1) An if/switch statement:

var p = &person{}
if key == "age" {
    p.age = value
}

2) Use a map instead of a struct:

var p = map[string]interface{}
p[key] = value

3) Use reflection. See this question for details, but generally you should avoid reflection. It's slow, and non-idiomatic, and it only works with exported fields (your example uses un-exported fields, so as written, is not a candidate for reflection anyway).