Go: create map with array of maps

Question

I'm trying to create a map with an array containing maps. My code:

Go:

func main() {
    m := map[string][]map[string]string{
        "photos": [{"a":"1"}, {"b": "2"}],
        "pictures": [{"a":"1"}, {"b": "2"}]
        }
    fmt.Println(m)
}

What is wrong with this? Is this possible?

http://play.golang.org/p/UkokGzvtGL

fabmilo · Accepted Answer · 2014-08-26 02:08:56Z

7

No Square brackets
Always comma at the end of the line

http://play.golang.org/p/USm9kqDANn

package main

import "fmt"

func main() {
    m := map[string][]map[string]string{
        "photos":   {{"a": "1"}, {"b": "2"}},
        "pictures": {{"a": "1"}, {"b": "2"}},
    }
    fmt.Println(m)
}

answered Aug 26, 2014 at 2:08

fabmilo

48.5k16 gold badges108 silver badges123 bronze badges

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

5 Comments

user3918985 Over a year ago

thanks. I'm actually trying to obtain a value from a flickr api json response. the result looks like this: { "photos": { "page": 1, "pages": "107553", "photo": [ { "id": "15035296541", "owner": "51816274@N05",}]}. how do I access id?

fabmilo Over a year ago

like this: result["photos"]["photo"][0]["id"]

user3918985 Over a year ago

thanks. when I do that, I get a panic error saying the index is out of range. I did: res := make(map[string]map[string][]map[string]string); json.Unmarshal(body, &res); photourl, _ := res["photos"]["photo"][0]["url_m"]

fabmilo Over a year ago

then it means that "photo" array has no values. You should check the len() of the array before accessing it

Dustin Over a year ago

You're really better off using a struct: play.golang.org/p/vRRZc8L5rL -- not sure why everyone tries to do this the hard way.

Collectives™ on Stack Overflow

Go: create map with array of maps

1 Answer 1

5 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

5 Comments

Your Answer

Sign up or log in

Post as a guest

Related