Parsing JSON keys into array of strings [duplicate]

Question

I am currently trying to handle a GET request that returns a body in application/json structured like this:

{
    "items": {
        "item001": {"id":1234, "name": "name001"},
        "item002": {"id":1235, "name": "name002"},
        "item003": {"id":1236, "name": "name003"}
      }
}

I'm trying to get an array of strings that looks like

array = ["item001", "item002", "item003"];

I don't care about any of the underlying hierarchy, I just need the key of each object as an array. I've tried several different methods (map(), JSON.stringify(), etc) but I can't seem to index each key in a array[i] format.

In fact, each time I try to even print the name of a single key, for example

var obj = JSON.parse({'whole json here'});
print(obj.items[1]);

I get an [object Object] error, which makes sense as obj.items is not indexed with a key other than "item001" for example. However, I do not know what the key for each object will be, hence the need for an array of the keys. Thank you in advance!

Object.keys(obj) returns an array of an object's property names. — Tyler Roper
– Tyler Roper, Commented Jun 26, 2018 at 17:26

brk · Accepted Answer · 2018-06-26 17:26:15Z

1

You can do Object.keys.It will return an array of the keys of an object

var x = {
  "items": {
    "item001": {
      "id": 1234,
      "name": "name001"
    },
    "item002": {
      "id": 1235,
      "name": "name002"
    },
    "item003": {
      "id": 1236,
      "name": "name003"
    }
  }
}

var y = Object.keys(x.items);

console.log(y)

answered Jun 26, 2018 at 17:26

brk

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Comments

amrender singh · Accepted Answer · 2018-06-26 17:26:28Z

1

You can use Object.keys(). For Reference

var obj={"items":{"item001":{"id":1234,"name":"name001"},"item002":{"id":1235,"name":"name002"},"item003":{"id":1236,"name":"name003"}}};
    
 var result = Object.keys(obj.items);
 
 console.log(result);

answered Jun 26, 2018 at 17:26

amrender singh

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Comments

amiraliamhh · Accepted Answer · 2018-06-26 17:27:22Z

1

Object.keys will do that.

var obj = JSON.parse({'your json'});
console.log( Object.keys(obj.items) );

answered Jun 26, 2018 at 17:27

amiraliamhh

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