Patterns | Swift library for Parser Expression Grammars | Parser library

The following link shows how to add multiple EntityRuler with spaCy. The code to do that is below:

I'm unable to add the product in cart. I want to see the product is adding to cart or not. but the process is not happening. I'm using Django as backend, PostgresSQL as DB and HTML, CSS and Javascript as backend.

The Codes Goes here:

views.py

PRODUCT DETAIL

Say I have the below line in file named "logs_test":

Sample input:

Getting "AttributeError: 'function' object has no attribute 'get_extra_actions'" error with Django 3.2.4 and djangorestframework 3.12.4

Logs:

I was taking freecodecamp.org course on JavaScript data structures, going through the RegExp chapter. I then came across the following assertion:

"The regular expression /(?=\w{3,6})(?=\D*\d)/ will check whether a password contains between 3 and 6 characters and at least one number". (Here "check" meaning that regExp.test(password) returns true)

This seems odd to me. First of all, looking around in Stack Exchange, I found in this post that states that A(?=B) is the definition of positive lookahead, and it makes no mention that A (the preceeding expression in the parenthesis) is optional. So, shouldn't freecodecamp's example have an expression before the first lookahead?

I believe that this another example is quite similar to the previously mentioned, but simpler so I will mention it in case the explanation is simpler, too:

Why does (?=\w)(?=\d), when checked against the string "1", returns true?, Shouldn't it look for an alphanumeric character followed by a numeric character?

PS: After a thought, I hypothesized that my first example checks both lookahead patterns independently (i.e. first it checks whether the string is made of three to six characters, returns true, then checks whether there is an alpha numeric character, and finally since both searchings returned true, the whole regexp test returns true). But this doesn't seem to be coherent with the definition mentioned in the post I've linked. Is there a more general definition or algorithm which the computer "internally" uses to deal with lookaheads?

I am working a SQL Server stored procedure to generate a 10 digits sequence with the following patterns where [CustomerCode] is say 'ABC':

How can I ensure fairness in the Pub/Sub Pattern in e.g. kafka when one publisher produces thousands of messages, while all other producers are in a low digit of messages? It's not predictable which producer will have high activity.

It would be great if other messages from other producers don't have to wait hours just because one producer is very very active.

What are the patterns for that? Is it possible with Kafka or another technology like Google PubSub? If yes, how?

Multiple partitions also doesn't work very well in that case, or I can see how.

I using CleanArchitecture solution. I have Data layer where ApplicationDbContext and UnitOfWork are located :

When defining a syntax, it is possible to match 1 or more times (+) or 0 or more times (*) similarly to how it is done in regex. However, I have not found in the rascal documentation if it is possible to also match a Symbol a specific amount of times. In regex (and Rascal patterns) this is done with an integer between two curly brackets but this doesn't seem to work for syntax definition. Ideally, I'd want something like: