Promotion | Udemy课程大促销汇总 - Python 3 Flask REST APIs入门与实战 | SQL Database library

I'm struggling to figure out how can I create a promotion type: "For every 3 items bought, Save 99% Off on the lowest price item" with the new promotions system of hybris from Backoffice, it's not very intuitive. Which are the conditions and actions that I must set?

My program grabs ~70 pages of 1000 items from an API and bulk-inserts it into a SQLite database using Sequelize. After looping through a few times, the memory usage of node goes up to around 1.2GB and and then eventually crashes the program with this error: FATAL ERROR: MarkCompactCollector: young object promotion failed Allocation failed - JavaScript heap out of memory. I've tried using delete for all of the big variables that I use for the response of the API call and stuff with variable = undefined and then global.gc(), however I still get huge amounts of memory usage and eventually it crashes. Would increasing the memory cap of Node.js help? Or would the memory usage of it just keep increasing until it hits the next cap?

Here's the full output of the error:

I have a problem to solve. First I split this problem into parts and so I wrote four queries separately but now I need to put them together as if it were a single call to return a single result. How can I do this?

1) I select purchases according to branch and store

I have a bottom Tab bar in my app for navigation and appbar, from the menu page after adding products in Cart screen there is Continue button when i pressed it take me to Login screen, there a normal login with and otp verification, now when i try to navigate back to menu screen after successfull otp verification, i see Tab bar disappeared and the App bar.

How i can fix this problem

Cart Screen

I am trying to show list of messages with different types of ViewHolders i.e. Text, ImageText, Video etc. I get a list of these objects from API somewhat in this format:

I am trying to make a filter for this information, this is an array of objects from a API with the information of all the products in the database, in this example I only show one product, but the API request all products.

I'm creating this website for a company for my student co-op and I had this header made for my website and when I made it, it worked completely fine. Now when I check on my phone I press the services button for my dropdown menu and it doesn't come down, but when I try on the google chrome dev responsive tool, I can click the drop down menu but I also cant unclick the menu. I understand that I have a lot of code written in my CSS file, I do have stuff labeled though like header/home page.

My Issue:

When I click on my responsive navbar when it's resized to a smaller ratio. I click the bar and my nav menu pulls up but when I click on my services drop down menu It doesn't come down, Although it works on google chrome responsive dev tools. But when I click the services button and it works the dropdown wont go away when I click it again, how can I fix this? Majority of my navbar is labeled "Header" in my css file. I decided to put my whole file in as maybe something is over writing it but I have no clue it is?

HTML

Integer promotion works by promoting everything of an inferior rank to either int or uint. But why is this so?

It makes sense to make a difference between "upgrading" and "downgrading" a type. When you are converting a short to a char you may lose data.

However when going up in ranks (bool -> char -> short -> int -> long -> long long) there is no chance to lose data. If I have a char it doesnt matter if I convert it to a short or an int, I still won't lose any data.

My question is why is int promotion only from a lower ranked type towards int? Why was the decision made to have it like this? Why not towards the next higher ranked type for example (and the go on from there, try to promote again for example).

Seems to me that the implicit conversion semantics seem a bit arbitrary when you try to describe them. "most int types can be "promoted", meaning a conversion with no possibility of data loss, but the promotion only works towards int, not just any higher ranked type. If you convert anything to something else other than int it is called a conversion"

Would it not be simpler to use the actual ranks of the int types to attempt a series of "promotions"? Or just to call any conversion towards a higher ranked int a "promotion"?

P.S. this is an educational question not one a bout a specific programming issue but rather for my own curiosity.

I have a pandas datafrme like this