sos | Simple Operating System for educational purposes

I have this background video:

Here's how I parse the xml response from this url

My hope is to validate an input field (PromoCode) prior to form submission. @Adrian J. Moreno pointed me to "The Remember The Milk sign-up form" (https://jqueryvalidation.org/files/demo/milk/) and @SOS has walked me through the process to this point.

I’ve got everything working (sort of) except grabbing the PromoCode from the DB (it’s currently hardcoded in the .cfc file.)

The site is for my brother who teaches multiple training courses and asked if I can add a promo code option to the registration form. He has several courses so there may be several promo codes (different for each possible course.)

I have 2 questions:

1. How do I grab the PromoCode for each course from SQL to compare to what the user types?
2. As indicated above, I’ve got everything else working except, currently, if the user types a wrong promo code it tells them it’s invalid as expected… BUT the user cannot submit the form unless they clear the field or enter the proper code. I’d like the user to be able to submit the form regardless of whether the PromoCode is valid or not. If it IS valid, they get the discount… if not, they don’t.

Here’s the stripped down code. I can provide the full code if necessary.

UPDATE: I have added the dput() input at the bottom of the post.

I have a large dataset of tweets that I would like to subset by month and year.

data_cleaning$date <- as.Date(data_cleaning$created_at, tryFormats = c("%Y-%m-%d", "%Y/%m/%d"), optional = FALSE)

I used the line of code above to format the date variable in the dataframe below.

To give a bit of context, i am trying to implement in matlab from scratch the following signal diagram, a Feedback Delay Network (FDN). pic: FDN

With an appropriate matrix, indifferent to delay lengths, virtually white noise comes out when fed a dirac impulse.

I've managed to do this in code, but my goal is another and hence my question. I want to apply a filter h(z) after each delay line z^-m. pic: h(z)

More specifically, i want to apply a third-octave cascaded graphic equalizer after each delay line. The purpose is to create frequency dependent attenuation on the whole structure, and consequently delay dependent. I've successfully designed the filter in the form of SOS, but my problem is: how do I apply it within the structure? I assume to use sosfilt() somewhere with what I have, but I'm not sure.

I haven't reduced the order of the system for sake of purpose. The order is 16 (16x16 matrix, 16 delay lines, 31x16 biquad filters)

The first code refers to the lossless FDN, safely runnable which generates white noise. I have commented my failed attempt to introduce the filtering in the loop saying: % Filtering

Unfortunately, I can't post all GEQ entries, but I'll leave 8 in the end corresponding to the first 8 delays.

So, the question is how do I code to filter the white noise, implementing frequency dependent attenuation in the whole FDN structure. Also, although it may be computationally inefficient, I'd prefer to apply this without higher level functions and based on what I already have, i.e: applicable in GNU Octave

Edit: Assuming you have to apply the bandpass 2nd order filtering sample by sample using the difference equation, how would you recursively do it for 31 bands in series? One is shown in the second code section.

I have this data structure in my MongoDb database:

I have a dataframe like the one below, just as an example of my dataframe (the list of tickers I have is very long). I would like to get a new dataframe where all the tickers which are accomplishing the 3 SOS signals 'Absorption Vol', 'Stopping Vol', 'Test in Rising' appear as a result.

I'm little new to Javascript.

This is using django as backend.

I'm trying to capture data from table columns like 'dose', 'duration' and 'usage' which uses text box and checkbox.

Whenever I hit the button with id='qty', then I'm able to see correct value for first click but when I click the button for another element it still submits same previous data instead of data on the same row.

Below is the sample output that I captured from console log

I am trying to write a program that will create a link to the API. To do this, I use bs4, with which I search for the div I need, but I get an error due to the program not working correctly. I want to find only this coin name that are in the coin list. How I can fix it? Please, give me a hand.

My code: