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I am really new to React JS. I am making a small project that has a table with movies in it. In the top it shows how many movies are there.

My problem is that this.setState() is not working. It is showing an error numberOfMovies is not defined.

My Code -

my question is a little complicated, I am building a trip-related web application where users can book trips. So I have made a function that increases the number of travelers as the user clicks the + sign. when this function is called it changes the state and another function gets triggered that displays the form to fill in the traveler details. Now this form is rendered according to the number of travelers traveling. how can I set that data in an array of objects?

here's a screenshot guide:

I want the data to be in the state like this:

My default Laravel application timezone is America/Los_Angeles (pst), I'm storing all the timestamps like created_at with this timezone in database.

In the user profile, we are providing options to select a timezone. While showing the list of data for example in trip listing I'm converting & showing created at as per user selected time zone ( $date->setTimezone($user->timezone);)

For example, if the trip Id 197 has created_at 2020-06-11 23:00:00 stored in db (as per default application timezone i.e. pst) while in the listing I'm showing 2020-06-12 02:00:00 (est timezone as per user profile 3 hrs ahead).

Now everything works fine until I had to add date range (start & end date) filter in the listing. The problem is if I'm selecting start date 2020-10-12 in the filter, in result it is not getting 197 trip id because in the database it is stored as 2020-06-11 23:00:00., this 197 id record should be there in listing after filter because as per auth user timezone the trip is added on 2020-06-12. My DB query is $trips->whereDate('created_at', '>=' ,$request->start_date);. I have the only date and not time in request for filter trips I need to somehow pass timezone in this query or is there any better solution for this. The date filter should work as per user selected timezone

so basically, I wanted to know how I can change the value of a single field in Django from views.py itself without needing to use forms.py

I want to do something like this...

I am trying to write a compute shader that works on a state. I want to store the initial value of this state in a single channel texture. However, this does not work.

I have the following code:

I am having a problem understanding how CSS grid works.

I want 3 columns side by side with a specific width and height, but there's a gap between each columns.

I'm coming to kotlin after working in mostly dynamically typed languages for years, so I get a lot of what I'm seeing, but I'm still tripping up a bit over reading some of the type annotations.

Most of them make sense (I've written some C++ and typescript so I'm not wholey familiar with more strictly type languages). so stuff like annotating the parameters and return types for functions, variable declaration, stuff like that makes sense.

What I'm having trouble with is the more complex annotations like looking at this explanation of the fold method when talking about higher order functions:

My first query is:

I currently have a string which contains multiple characters. Certain characters need replacing with others based on their Unicode. For example '£' needs to become GBP. I have a Dictionary of the conversions like so.