qr | Print Unicode-friendly QR codes straight in your terminal | QRCode Processing library

I have an image (QR image) that i have to display it, and keep refreshing it every time. I tried many solutions but none worked, this is my code:

I have two classes, App and qrCode. The qrCode class returns a image of the qrcode based on the address provided in that classes state. The app class displays the qrcode component. In the method getSessionID, the app makes a request to the server, then should call updateQrCode to update the qrcode that is being shown.

How can I call the method updateQrCode from App.js? I can't instantiate a new QrCode, because that is not the instance that is being displayed.

App.js:

Hi I'm trying to read a QR code and send the data in the QR code to my server. But when running flutter build ios I get the error in xcode when launching the app:

I'm using Kotlin and vertx. In my vertx app, I'm trying to send a ByteArray to another event consumer.

To do this i'm converting it to a string, and then once its received in the 2nd handler I'm converting it back to a ByteArray but the objects aren't equal. They are very different and I have no idea why.

My 2 event handlers are:

As we know, Paytm has launched a Dynamic QR device to display invoice/bill QR Code image.

I have to integrate this device with a billing system(POS), where I have to send QRCode data to this device.

I have to integrate it using C#.NET

Note:- As per the device guidelines, we can transfer data from system to device using USB Port(the serial port communication) Reference

I am trying to create a numpy matrix with each matrix element as output element of a function, using numpy's fromfunction. Below is my code and it fails with an error message IndexError: arrays used as indices must be of integer (or boolean) type. I read some resources on Stackoverflow which said that the documentation is misleading (Parameters to numpy's fromfunction) and it sometimes doesn't work as expected. After reading these threads, I suspect that the problem is that I access two arrays, q_x and rs in the input function. Any idea on how to get rid of the error?

I have the next code, where I have negative positive and negative values and I want to put the positive values above the edge of bar, and negative values below the edge of the bar. I want to know too how to change the y axes (limites), changes the order of "Flujo" and how to change background graph.

It's Vue.js app and the code looks as following:

I've been trying to fix this for weeks but failed, when I click on login (indicated with the id "lin") to open a new activity the app crash, i don't know if it's a problem with the Intent or something else, here is the code. The manifest should be ok so I think it's a problem in the MainActivity with Intent ab. The other activity is called Qrcode. I tried to change appcompatactivty to activity but didn't work, i don't really know what to do.

Edit: I posted the code of the qrcode activity, i got it from the answers of this question : Android, How to read QR code in my application?, only for educational purpose of course.

Edit 2: logcat posted, sorry for any issues with asking this question, it's the first question i ask here.

Logcat