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using the following feed:
http://api.twitter.com/1/statuses/user_timeline.json?screen_name=microsoft&include_rts=1&count=10
I am successfully able to loop through this to get the details I want to display on my html page.
However, I need to check if retweeted_status.user.profile_image_url exists, and I am not sure how to do that?
Currently I am looping through the data where data is returned by jquery-ajax:
data[i].retweeted_status.user.profile_image_url
if data[i].retweeted_status.user.profile_image_url does not exist, it does not return null or undefined, I just get the following error:
cannot read property 'user' of undefined
528
JavaScript | Check if a key exists inside a JSON object. Given a JSON Object, the task is to check whether a key exists in Object or not using JavaScript. We’re going to discuss few methods. hasOwnProperty() This method returns a boolean denoting whether the object has the defined property as its own property (as opposed to inheriting it).
And you wanted to check if the percentage key is present or not in JSON data. if it is present directly to access its value instead of iterating the entire JSON. Note: We used json.loads () method to convert JSON encoded data into a Python dictionary. After turning JSON data into a dictionary, we can check if a key exists or not.
Given a JSON Object, the task is to check whether a key exists in Object or not using JavaScript. We’re going to discuss few methods. hasOwnProperty() This method returns a boolean denoting whether the object has the defined property as its own property (as opposed to inheriting it). Syntax: obj.hasOwnProperty(prop) Parameters:
Below function can be used to check for a value in any level in a JSON function _isContains (json, value) { let contains = false; Object.keys (json).some (key => { contains = typeof json [key] === 'object' ? _isContains (json [key], value) : json [key] === value; return contains; }); return contains; }
I think it's a good answer:
if('key' in myObj)
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