What is the best way to convert array of interface into array of map in golang?

Question

I've created a web server and this server is able to get POST request. However, when I send array of map[string]string in POST data, server receives it as array of interface{}. How can I convert it back to array of map[string]string?

Example : Like when I send following example in POST request,

params : [{"name" : "shail", "age" : 24}]

I'm sending params as

[](map[string]string)

but when server receives this data, it treats params as

[]interface{}

.How do I assign params in a variable defined by

[](map[string]interface{})

?

What do you mean by "when I send?" Do you Marshall this into JSON and then Unmarshall it? How are you Unmarshalling it? Are you sending GOB instead of JSON? What code you "receives it as array of interface{}?" There is no standard web protocol that sends "interface{}". Have you looked at the examples in encoding/json? — Rob Napier
– Rob Napier, Commented Aug 29, 2015 at 22:42
Agreed. I provided an admittedly dumb answer below - you can Unmarshal the JSON payload on a struct and get type safety and more code clarity..... — Alessandro Santini
– Alessandro Santini, Commented Aug 29, 2015 at 22:45

Alessandro Santini · Accepted Answer · 2015-08-29 22:42:24Z

1

The easiest thing you can do is a type assertion on the values:

package main

import (
    "fmt"
    "reflect"
)

func main() {
    var source []interface{}
    var test = make(map[string]string, 0)
    test["hello"] = "World"
    source = append(source, test)
    var dest = source[0].(map[string]string)
    fmt.Println(reflect.TypeOf(dest).Kind())
    fmt.Println(dest["hello"])
}

edited Aug 29, 2015 at 22:42

answered Aug 29, 2015 at 22:24

Alessandro Santini

2,03315 silver badges19 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

What is the best way to convert array of interface into array of map in golang?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related