CODEWITHSUNDEEP
javascriptobject
max
max

Reputation: 623

JS how to extract object keys

I have an object which looks like this:

var room = {"a":
    [
        {room: "1.2.1"},
        {room: "1.2.2"},
        {room: "1.2.3"}
    ],
    1.2: [
        {room: "1.3.1"},
        {room: "1.3.2"},
        {room: "1.3.3"}
    ]};

I only want to read the object's properties which are a and 1.2 and put it into a variable.

For example: 

var oname = room.getName();
output:
a
1.2

Upvotes: 0

Views: 121

Answers (3)

Andrea Fiore
Andrea Fiore

Reputation: 116

Something like this?

function getRoomName(r){
    var names="";
    for (var prop in r) {
        names+=prop+"\n";
    }
    return names;
}

console.log(getRoomName(room));

Upvotes: 2

levi
levi

Reputation: 22697

use Object.keys()

var keys = Object.keys(room)

Then keys will have ["a","1.2"] as value.

Also, you have a dict where its values are arrays, not an array itself.

Upvotes: 4

Jenish Rabadiya
Jenish Rabadiya

Reputation: 6766

you can also try like following.

In Below snippet for in loop will iterate over object properties.

var room = {"a":
                  [
                     {room: "1.2.1"},
                     {room: "1.2.2"},
                     {room: "1.2.3"}
                 ],
            1.2: [
                    {room: "1.3.1"},
                    {room: "1.3.2"},
                    {room: "1.3.3"}
                ]};

$(function(){
    for(obj in room)
    {
        //debugger;
        document.write(obj)
    }

})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

Upvotes: 1

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