Linked Questions

How do I check if an object has a specific property in JavaScript? Consider: x = {'key': 1}; if ( x.hasOwnProperty('key') ) { //Do this } Is there another way to do it?

I have used like below example to check property exists on an object. const payload ={payment:0} if(payload && payload.payment){ console.log(payload.payment) }else{ console.log('Issue') }...

I have an object like this: let column = ["A", "B", "C", "D"] validation: { type: ... id: ... // and possible report that could exists or not ...

Variable br must consist only of bool values. Which have been gotten by looping through the first array. state ={ nonRelated: this.props.non_related.value, 1:true, 2:true, 3:false, ...

I'm new to using react.js, and am trying to write a re-usable component that has an optional property passed to it. In the component, that optional property pulls data from a db using meteor, then I ...

The new method Object.hasOwn() returns a boolean indicating whether the specified object has the indicated property as its own property but so does Object.prototype.hasOwnProperty(), what is the ...

I have this code : user.findOne( { 'email' : email }, function( err, User ) { if ( err ) { return done(err); } ...

I am trying to access a certain member in a JavaScript object. In order to do this, I need to try out a couple of key values. For example, Object['text/html'] which will give me an export link for a ...

I have an array of objects that I want to filter based on the name of the key for those objects. In this particular case I know that there will be one key/value pair for each element in the array. ...

I have a list of objects in the following way: obj = [ { a:[1,2,3] }, { b:[4,5,6] }, { c:[7,8,9] } ] How do I get the correspoding array for a key using javascript? Eg. For b, I would get [4,5,6]. I ...

I am having the JSON array of objects like below, let data = [ { "node":[ { "name":"aaaaa", "count":"2", } ] ...

So, similar to my my previous question here (I was unsure whether to make a new question or edit the old one), I managed to sucessfully parse the body JSON response using the code seen below. However ...

(Using javascript) I've seen some answers saying dictionary.has("key") will evaluate to true or false based on if the key is in the dictionary. For some reason, this hasn't worked for me at ...

I have list of objects response.tasks: {userLastName: ', srCreationDate: '', idNumber: '', firstName: ', insStartDate: null, …} and I want to know if I have some properties for userLastName it will be ...

New learner here, I'm stuck on a practice question for a course and I'm not sure what it's asking me to do here. The problem is as follows: Write a function that takes a user object, which represents ...