CODEWITHSUNDEEP
javascriptjson
sehummel
sehummel

Reputation: 5568

How to count JSON objects

Here is my JSON:

[
    {
        "id": "38",
        "article_id": "16",
        "news_event": "625",
        "language": "en",
        "channel_partner_id": "625",
        "title": "Test",
        "show_logo": null,
        "description": "test\n\n",
        "schedule": null,
        "event_date": "2012-03-09 10:08:35",
        "link_text": null,
        "guid": null,
        "timestamp": "2012-03-09 11:19:42",
        "website": null,
        "show_hours": null,
        "page_text": null
    },
    {
        "id": "37",
        "article_id": "15",
        "news_event": "625",
        "language": "en",
        "channel_partner_id": "625",
        "title": "Test",
        "show_logo": null,
        "description": "test\n\n",
        "schedule": null,
        "event_date": "2012-03-09 10:08:35",
        "link_text": null,
        "guid": null,
        "timestamp": "2012-03-09 11:19:39",
        "website": null,
        "show_hours": null,
        "page_text": null
    },
    {
        "id": "36",
        "article_id": "14",
        "news_event": "625",
        "language": "en",
        "channel_partner_id": "625",
        "title": "Test",
        "show_logo": null,
        "description": "test\n\n",
        "schedule": null,
        "event_date": "2012-03-09 10:08:35",
        "link_text": null,
        "guid": null,
        "timestamp": "2012-03-09 11:19:35",
        "website": null,
        "show_hours": null,
        "page_text": null
    },
    {
        "id": "35",
        "article_id": "13",
        "news_event": "625",
        "language": "en",
        "channel_partner_id": "625",
        "title": "Test",
        "show_logo": null,
        "description": "test\n\n",
        "schedule": null,
        "event_date": "2012-03-09 10:08:35",
        "link_text": null,
        "guid": null,
        "timestamp": "2012-03-09 11:19:31",
        "website": null,
        "show_hours": null,
        "page_text": null
    }
]

How do I count the number of objects in it?

Upvotes: 25

Views: 189098

Answers (7)

Ben
Ben

Reputation: 426

const data = JSON.parse(this.response);

var length = 0;

for (var k in data) 
  if (data.hasOwnProperty(k)) 
     length++;

Upvotes: 0

Raheel Khan
Raheel Khan

Reputation: 494

You can also use online JSON editors to verify, for instance, try JSON Editor Online by josdejong

Upvotes: 3

xxnations
xxnations

Reputation: 645

You can use the following solution to count JSON objects:

var jsonObject = {"test1":1,"test2":2};
var keyCount  = Object.keys(jsonObject).length;

Upvotes: 51

Jorge Nones
Jorge Nones

Reputation: 59

var json = [{ "id": "38", "article_id": "16", "news_event": "625", "language": "en", "channel_partner_id": "625", "title": "Test", "show_logo": null, "description": "test\n\n", "schedule": null, "event_date": "2012-03-09 10:08:35", "link_text": null, "guid": null, "timestamp": "2012-03-09 11:19:42", "website": null, "show_hours": null, "page_text": null }, { "id": "37", "article_id": "15", "news_event": "625", "language": "en", "channel_partner_id": "625", "title": "Test", "show_logo": null, "description": "test\n\n", "schedule": null, "event_date": "2012-03-09 10:08:35", "link_text": null, "guid": null, "timestamp": "2012-03-09 11:19:39", "website": null, "show_hours": null, "page_text": null }, { "id": "36", "article_id": "14", "news_event": "625", "language": "en", "channel_partner_id": "625", "title": "Test", "show_logo": null, "description": "test\n\n", "schedule": null, "event_date": "2012-03-09 10:08:35", "link_text": null, "guid": null, "timestamp": "2012-03-09 11:19:35", "website": null, "show_hours": null, "page_text": null }, { "id": "35", "article_id": "13", "news_event": "625", "language": "en", "channel_partner_id": "625", "title": "Test", "show_logo": null, "description": "test\n\n", "schedule": null, "event_date": "2012-03-09 10:08:35", "link_text": null, "guid": null, "timestamp": "2012-03-09 11:19:31", "website": null, "show_hours": null, "page_text": null}]


//Object.keys(json).length --> USE

for (var i = 1, l = Object.keys(json).length; i <= l; i++) {

}

//by:Jorge Nones, Jales.

Upvotes: 5

ron tornambe
ron tornambe

Reputation: 10780

This routine counts 4 array elements with 16 attributes per element:

var obj = [{ "id": "38", "article_id": "16", "news_event": "625", "language": "en", "channel_partner_id": "625", "title": "Test", "show_logo": null, "description": "test\n\n", "schedule": null, "event_date": "2012-03-09 10:08:35", "link_text": null, "guid": null, "timestamp": "2012-03-09 11:19:42", "website": null, "show_hours": null, "page_text": null }, { "id": "37", "article_id": "15", "news_event": "625", "language": "en", "channel_partner_id": "625", "title": "Test", "show_logo": null, "description": "test\n\n", "schedule": null, "event_date": "2012-03-09 10:08:35", "link_text": null, "guid": null, "timestamp": "2012-03-09 11:19:39", "website": null, "show_hours": null, "page_text": null }, { "id": "36", "article_id": "14", "news_event": "625", "language": "en", "channel_partner_id": "625", "title": "Test", "show_logo": null, "description": "test\n\n", "schedule": null, "event_date": "2012-03-09 10:08:35", "link_text": null, "guid": null, "timestamp": "2012-03-09 11:19:35", "website": null, "show_hours": null, "page_text": null }, { "id": "35", "article_id": "13", "news_event": "625", "language": "en", "channel_partner_id": "625", "title": "Test", "show_logo": null, "description": "test\n\n", "schedule": null, "event_date": "2012-03-09 10:08:35", "link_text": null, "guid": null, "timestamp": "2012-03-09 11:19:31", "website": null, "show_hours": null, "page_text": null}]
for (var i = 0; i < obj.length; i++) {
  var ctr=0;
  for (attr in obj[i]) ctr++;
  alert('array['+i+']: ' +ctr);
}

Upvotes: 0

Brad Christie
Brad Christie

Reputation: 101594

Assuming it's in the variable foo, foo.length.

var foo = [{...},{...},...];
alert(foo.length);
foo[0].id// 38;

Upvotes: 5

SLaks
SLaks

Reputation: 887275

That's an array.
You can parse it (JSON.parse), then use the length property.

Upvotes: 30

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