Linked Questions
103 questions linked to/from How do I test for an empty JavaScript object?
531
votes
23
answers
767k
views
Is object empty? [duplicate]
What is the fastest way to check if an object is empty or not?
Is there a faster and better way than this:
function count_obj(obj){
var i = 0;
for(var key in obj){
++i;
}
...
- 1
26
votes
9
answers
71k
views
How to check whether an object is empty? [duplicate]
I'm learing JavaScript. I cannot grasp the idea of an empty object. As I understand, there are situations when I need to check a variable whether it holds an object and has a value.
So far, I know ...
- 271
27
votes
5
answers
145k
views
javascript - check if object is empty [duplicate]
I am trying to create to javascript/jquery test to check if my object is empty and cannot figure it out.
Here is the object when it has something in it:
{"mergedSellerArray":{"key1114":"1120"}}
And ...
- 1,487
41
votes
1
answer
59k
views
Javascript: Checking if an object has no properties or if a map/associative-array is empty [duplicate]
Possible Duplicate:
How do I test for an empty Javascript object from JSON?
Is there an easy way to check if an object has no properties, in Javascript? Or in other words, an easy way to check if ...
- 95.8k
5
votes
3
answers
44k
views
Check if Object is Empty in ES6 [duplicate]
I need to check whether the status is approved or not, so i check it if it is empty. Whats the most efficient way to do this?
RESPONSE
{
"id": 2,
"email": "[email protected]",
"...
- 7,855
6
votes
3
answers
4k
views
Using an empty object as a parameter to a conditional if loop [duplicate]
This is similar to what I have been trying to do,
var obj = {};
if(obj){
//do something
}
What i want to do is that the condition should fail when the object is empty.
I tried using JSON.stringify(...
- 105
7
votes
2
answers
4k
views
How to handle empty object in if statement as false? [duplicate]
I ran across this case today
if ({}) {
// This is returned as empty object is true
}
therefore need to figure out a way where {} is false, tried calling .length on an object I pass to the if ...
- 46.8k
9
votes
3
answers
2k
views
How to find index of empty object in array of object [duplicate]
If I have an array like [{a:'b'},{}] and if I try to find an index of element {}. Then I am unable to get the correct index.
I have tried indexOf,findIndex and lodash's findIndex but all is returning ...
- 105
6
votes
4
answers
5k
views
How do I check this boolean hashmap is empty in javascript? [duplicate]
Possible Duplicates:
Object comparison in JavaScript
How do I test for an empty Javascript object from JSON?
var abc = {};
console.log(abc=={}) //false, why?
Why is it false? How do I match a ...
- 274k
6
votes
2
answers
8k
views
Check if object inside an object is empty with javascript [duplicate]
Hello I have an object:
var equippedItems = {
weapon: {},
armor: {},
accessory: {}
};
I need a way to check if equippedItems.weapon equals to '' at some point I am doing something like equippedItems....
- 361
1
vote
3
answers
9k
views
javascript - how to check if exists child object value of key in object? [duplicate]
{
"cd": {},
"person": {},
"p2": {
"foo1": {},
"foo2": {}
}
}
"cd" doesn't have child object (empty object).
"p2" has child object.
how to check if exists child object ...
- 125
0
votes
1
answer
1k
views
Check for empty angular object in html [duplicate]
Im trying to disable a button on a condition whether an object is empty or not. In this case the object selectedTopics should be equal to {}
register.ts
ngOnInit() {
this.topicRequestAnswer = {...
- 443
1
vote
3
answers
1k
views
How do I recognize an empty JSON object in JS returned by my Rails controller? [duplicate]
How do I check for an empty JSON object in Javascript? I thought the key was
var isEmpty = (response || []).length === 0;
but this isn't it. In my JS console, I have tried
jsonresp = {}
{}
...
- 993
-1
votes
3
answers
641
views
Javascript Checking Variable [duplicate]
Possible Duplicate:
How do I test for an empty Javascript object from JSON?
var test= {};
var incidentReport = {
"place1": "n/a",
"place2": "n/a",
"place3": "n/a",
}
Above are ...
- 3,814
2
votes
2
answers
433
views
Different ways of defining unassign variable in javascript [duplicate]
I know when we want to define unassign variable in Javascript we can do:
var p;
and the other:
var p ={};
i want to know differences between these two ways, and if i define a variable in second way ...
- 2,255