This question already has answers here:
Testing for an empty array object in JSON with jQuery
(5 answers)
Closed 8 years ago.
I have the following JSON object that is passed to one of my functions …
{"action":"setProjectAll", "application":{"proId":"new","zoomPosition":35,"scrollerPosition":0,"language":"en","timelinePosition":0}, "clips":[]}
How can I test this object for the propertie "clip" to be "[]" (empty)?
Right now in the example above it is empty, however since the object is dynamic I need to test for that property if it contains values or not.
How can that be done?
thank you
How about
if (x.clips && x.clips.length === 0)
Related
This question already has answers here:
Using optional chaining operator for object property access
(2 answers)
Access Javascript nested objects safely
(14 answers)
Closed 7 months ago.
I want to use the following condition
if (this.solvedConflictsDetails[this.instance.instanceId][this.model.name][this.entity.entityId].solved)
The problem is that if one of the above doesn't exist in the object it will say cannot read undefined
How would you check a condition like this?
This question already has answers here:
How can I access and process nested objects, arrays, or JSON?
(31 answers)
Closed 1 year ago.
I'm trying to extract a value with a specified key. below are the data example;
example = [{'a':0,'b':2,'c':4}]
"results I want : 2"
To get the value of b, you would need to use example[0]['b']. You need the [0] since you also have an array enclosing the object.
This question already has answers here:
How to use a variable for a key in a JavaScript object literal?
(16 answers)
Closed 3 years ago.
I'm not getting the actual value of my parameter name in the below function. Object.assign taking the function parameter name as a string literal so the resulted JSON object also named as name
see the below code.
Please see the resulted json object i got.
How to fix this?
wrap it with []
return Object.assign(..., {[name]: JSON.parse(...)})
This question already has answers here:
if (key in object) or if(object.hasOwnProperty(key)
(9 answers)
Closed 4 years ago.
I just want to know if those 2 statements are equals or not, JS makes me mad and its behavior remain too esoteric. Within my app, it occurs some strange results ...
value in item and item.hasOwnProperty(value)
Thanks in advance
in also looks up the prototype tree while hasOwnProperty only checks the object itself.
This question already has answers here:
Checking if an array has some items in coffeescript
(3 answers)
Closed 8 years ago.
I am trying to figure out if an array is empty. I tried this and it does not work.
a = []
if a == []
alert "empty"
I know I can check the length of the array but am curious why this does not work.
There is no direct empty check for arrays. You could do something like this though:
a = []
alert("empty") unless a.length