kan | Kan : A browser extension for reading nLab | Browser Plugin library

In his paper Generics for the Masses Hinze reviews encoding of data type.

Starting from Nat

how do I get my back button to work normally? I want to have every nav item to appear after clicking the back button. The point is that I need to make a nav bar like this. But not great at javascript. so would love to get some help with this.

HTML

I have a school project I am workin gon and I am really struggling to figure this one out..

The project is to generate a list of 1000 random numbers between 1 and 10 and then removing every instance of 7 in this list. But the tricky part is that we are supposed to count the amount of removed 7s and printing this to the console...

Any ideas?

This is not my code and is just something I am playing around with but this is what I got so far.

I am making a non-default constructor in Java and whenever I test my code with the JUnit tests my teachers gave me I get that they failed. When I debug I don't find the issue, because my values are literally correct untill somehow it gets my last values of the constructor.

I really don't know what I am doing wrong, but here is my code for my non-default constructor.

I have been trying to connect to a local Node JS API using Flutter Web. I am using the Dio dart Package with a GET and a POST method, however, the response of my POST method does not return anything. See below a few instances of code and what I am seeing:

On my Node JS app I am receiving information from flutter:

I'm trying to learn pandas and python to transfer some problems from excel to pandas/python. I have a big csv file from my bank with over 10000 records. I want to categorize the records based on the description. For that I have a big mapping file with keywords. In excel I used vLookup and I'm trying to get this solution into Pandas/python

So I can read the csv into a dataframe dfMain. One column (in dfMain) with text called description is for me input to categorize it based on an the mapping file called dfMap.

dfMain looks simplified something like this:

I have a really simple problem, that when I try to read data from the FireBase database, with the following code I get this error: "TypeError: ref is not a function" . I dig trough a lot of documentation and they all use it like this, but I do not have a function like that for my ref variable. I want to query all the animal names for a user ('AllatNev').

i have a question, ive been banging my head against my desk for too long so iam taking it to stackoverflow. hope you guys can help me! :)

although i know the Error is very specific, i cant seem to get my head arround it. Iam trying to create a relationship that goes as follows A User has One Account and One Account has many trades. Still iam getting the error back:

TypeError: DeclarativeMeta object got multiple values for keyword argument 'owner_id'

if someone could please explain this to me that would be great!

Iam working with Python, fastapi and sqlalchemy although, i do think that i made a mistake with sqlalchemy

My models.py

So I would like to multi-thread the following working piece of code with concurrent futures but nothing I've tried so far seems to work.