Nuance | Visualization ideas for data science | Data Visualization library

I am currently learning Python and was answering questions on a practice quiz where I encountered the following questions:

1. What is the output of print(type({}) is set) ?
2. What is the output of print(type([]) is list) ?

I am unsure on how to approach the justification as to why Q1. yields False, yet Q2. yields True. I am following the guidance from a relevant post detailing the nuances of the keyword is, yet I fail to see where the two differ when comparing lists vs sets.

We often have columns that can contain values of varying sizes. For these, I like to set the data type to VARCHAR with a size way beyond the current maximum length. For example, if I have a column where the current minimum length for a value is 10 and the maximum length is 35, I might set the data type to VARCHAR(64). My rationale is that Db2 stores the 2 byte length followed by the exact value, therefore, there is no difference, from a storage perspective, defining the data type as VARCHAR(64) instead of VARCHAR(35). And I don't get an error if I a value with a length of 36 comes along.

Is there a nuance that I'm missing and should I not be so glib about my VARCHAR assignments?

I am creating a new variable and because of NAs and because only some individuals meet the grouping criteria, I end up with numerous new NAs in my final dataset.

Here is the data.

UPDATED Example dataframe:

In my C++ program I have a class, in some methods of which there are same routines happen, such as opening streams for reading/writing to files, parsing files, determining mime types, etc. Same routines are also used in constructor. To make methods more compact and avoid typing same code multiple times I split these routine operations into private methods for using inside the class only. However, some of these private methods depend on the result of the others, so that calling these methods in wrong order could lead in pretty bad consequences. Just a stupid example:

I have three buttons, I want to do this when you click on it, the background changed, for example, when you click on the red button, the background color changed to red, but here there is one important nuance if you click, for example, on the red button, and then another button, then the old color should disappear

For example, I clicked on the orange button, the background of the button turned orange, and then I clicked on the green button, then the orange background should disappear, You can also look at the code in codesandbox

I have a simple page that has an embedded video and a range slider that acts as a progress bar. Javascript updates the value of the range slider as the video plays and the slider can be used to move back or forth in the video.

The problem is that if I interact with the range slider to change playback position, the slider will no longer visually move even when the video is playing and javascript is updating the value of the input element.

I'm probably missing some obvious fundamental nuance. Thanks!

Here is the JSFiddle of the setup.

I have two buttons I want to do so that when the first button is pressed, its background changes (for example, red) and the background color of the second button becomes white and vice versa when the second button is pressed, the background color of the second button becomes red, and the color of the first button becomes white

I have two tables:

Table 1

I've been using this AppScript function that I took from here with slight modifications and it seemed to work fine, it just takes in a query and returns a 2D array. However, if the query is big and comes back with more totalRows than rows and therefore requires pagination, the job doesn't seem to be persistent and therefore I get the following error after the while (queryResults.pageToken):