Get structure field by string in Goland-CodePudding

In JS i can just:

const str = "Name"
const obj = {"Name" : "SomeName"}
console.log(obj[str])

How i can do this in GoLand?

CodePudding user response：

Typically, you don't do this with structs in Go. When you need to be able to do this, the best way is usually to create a map[string]string first, which you can access the same way as in JS. Then you convert it into a struct with code like

structFromMap := myStructType{
 Name: myMap["Name"], 
 FavoritePokemon: myMap["FavoritePokemon"],
}

If you really need to interact with a struct this way, you can import the "reflect" package and then do

reflect.ValueOf(myStruct).FieldByName("Name")

CodePudding user response：

package main

import (
    "fmt"
    "reflect"
)

func main() {
    type user struct {
        firstName string
        lastName  string
    } // hire you define your struct

    u := user{firstName: "John", lastName: "Doe"}
    s := reflect.ValueOf(u)

    fmt.Println("Name:", s.FieldByName("firstName"))
}

To help u started in Go I recommend this: https://quii.gitbook.io/learn-go-with-tests/

Have a good study/code :)

CodePudding user response：

kindly, You can use mapping in golang:

str:= "name"
obj := map[string]interface{}{
   "name": "someName",
}
fmt.printLn(obj[str])