PartsList | Example App : RecyclerView with Kotlin on Android | RecyclerView library

I get an error in Visual Studio whenever I submit data on access. Need help tried everything on google but it still happens. Thank you

I have a program that needs to read a CSV file called PartsList.csv. It looks at the first column, compares it with a dictionary that was made before this snip of code runs, and if the first column matches it, it will take the value from the key-value pair that was compared, use that as a key in dictionary catd{} and set the value as an empty tuple. Then it takes the empty tuple, is converted into a list into the variable holder, the value in the second column is appended to the list, and is converted back into a tuple as a value for the previously mentioned key. However, the problem I'm having is that after iterating once, it completely ignores the inner for loop. It makes the keys I need it to make, but because the inner for loop is ignored, it doesn't generate the values for it. I don't know what the problem is, so any help is appreciated.

Here is the relevant code:

So I made a program that reads and writes to excel files.

About one year ago I made a similar program that still works fine. I made a new one as I have gained more experience, and wanted an updated version.

The new program launches just fine on every computer, but once I try to click my button to check an excel file and open a new window, the program crashes.

When i try to output a material of type string of class 'Brakes' using polymorphism, it doesn't print correctly. I believe the problem has to do with me instantiating a new derived object. How do I populate a derived object with data members into an array of pointers of the base class in C++? Sorry if the format for the code is wrong rr if I didn't give enough information, it is my first time here.

in main():

Parts *partsList = new Parts[arrayCount];

function call:

I would like to read the preferred_part and if it is true it should display checkmark and if it is false it won't display anything. This is the code I have below and the error I get is:

TypeError: Cannot read property 'substring' of undefined.

I don't even properly know how I should be able to read the boolean values of preferred part in any other way. Any sort of help will be appreciated. Please tell me how I can solve this issue. I am new to react. Thank you!

I'm building a work orders model in django. I'd like to have an array field for parts required with quantities and another array field of parts produced with quantities. The parts would be foreign keys from a model in an inventory app I have already created. From what I've read PostgreSQL won't allow for foreign keys in an array field. so I would need to have a many to many field in a new model. But I'm not sure how to construct that. what would be the best way to go about this?

models.py

Im currently writing a program which main function is to read files and perform calculations. Currently im working on a function whos function is to process a set of calcuations based on variables within multiple text files. Below are two text files needed for this function

Customers.txt

I have two vector structs, one contains the codes and cost for each, and another is just orders that contains requested codes and totalCost (to be calculated)

vector parts(codes, cost);

vector orders(codes, totalCost); //totalCost set to 0;

where the parts vector contains something like ('A', 10, 'B', 20);

Where A and B are parts, 10 is cost for A, 20 cost for B.

and the orders vector contains orders such as A,B,C or just A,B Say we receive an order of parts A and B.

how do we go about adding these two based on cost from parts and storing the result in a new int that we gonna use later to add to the vector struct orders (totalCost).

I was trying for several hours, I think I need to use std::transform and maybe std::accumulate? just not sure how to put the two together...

This is what I have written so far: