Detect if object is empty or not

Question

I'm trying to detect if an object has data or not but this doesn't seem to work:

if(item.sellers.length != 0) {

Full code:

.each(response, function(i, item) {
       if(item.sellers.length != 0) {
            $.each(item.sellers, function(index, value) {
              $('#modal-table tbody').append("<tr><td></td><td><strong>Seller:</strong></td><td>" + index + "</td><td>"+ value + "</td>");
            });
       });

json is as follows:

response = 
    {
        "5": {
            "name": "surgeon bueno",
            "country": "Spain",
            "antiquity": "renewal",
            "amount": "2686.97 USD",
            "sellers": {
                "Frank": "2690.58 USD",
                "Bob": "1690.58 USD",
            }
        },
        "11": {
            "name": "Alex Lloyd",
            "country": "American Samoa",
            "antiquity": "new client",
            "amount": "0.0 USD"
        },
        "12": {
            "name": "alex lloyd",
            "country": "Aruba",
            "antiquity": "new client",
            "amount": "0.0 USD"
        }
    }

Please give us more information, and if possible, the best way to do so is to do it with fiddle or codepen. — ristapk
– ristapk, Commented Sep 22, 2016 at 10:03
We need to see the definition of item e.g. what are you iterating through? — DBS
– DBS, Commented Sep 22, 2016 at 10:04
Depends on what you define as empty. If you mean if it has no properties, use Object.keys(item.sellers).length == 0. If you want to check if all properties have no value/undefined/null then you need to check them individually — Rory McCrossan
– Rory McCrossan, Commented Sep 22, 2016 at 10:05

krlzlx · Accepted Answer · 2016-09-22 10:12:23Z

3

Use hasOwnProperty:

if(item.hasOwnProperty("sellers")) {
    // each loop
}

answered Sep 22, 2016 at 10:12

krlzlx

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Comments

Rory McCrossan · Accepted Answer · 2016-09-22 10:10:54Z

0

if (item.sellers.length != 0) {

You can use objects directly inside if()

if (item && item.sellers) {
    // write your functionality
}

edited Sep 22, 2016 at 10:10

Rory McCrossan

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answered Sep 22, 2016 at 10:09

Aman Nagarkoti

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Comments

Sandip - Frontend Developer · Accepted Answer · 2016-09-22 10:12:41Z

0

In your case check every object:

if(item!=null && item.sellers!=null && item.sellers.length != 0)
{
}

answered Sep 22, 2016 at 10:12

Sandip - Frontend Developer

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Comments

Bojan B · Accepted Answer · 2016-09-22 11:19:39Z

0

On this question I am posting an simple solution to check whether the jquery object has any child or not this can be checked using javascript function here is the code

var x=new Object();    
x.name='Scott';    
console.log(x);    
console.log(isempty(x));    
console.log(x.name); 

function isempty(obj)    
{    
  if(Object.getOwnPropertyNames(x).length===0)
    return true
  else 
    return false
}

edited Sep 22, 2016 at 11:19

Bojan B

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answered Sep 22, 2016 at 10:18

Dnyaneshwar Mule

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