allReady | repo contains the code for allReady , an open-source | Application Framework library

What exception are you facing while trying to save? A stack trace would've been more helpful. However, you can work around this in two ways

Either, If you want to avoid saving TargetAudience altogether, you can annotate the TargetAudience property in @Transient annotation so, it'll not be considered for database saving.

Or, JPA is trying to save the object with new primary key every-time because the object is in detached state (if your JPA provider is hibernate, which is default JPA provider). You should modify registerStudent() method in StudentService like -

You may use:

You call e.preventDefault() unconditionally.

This means, that whatever your code does, you will never submit the form (the default action)

Wrap the prevent default in an if statement and execute it only if the validation fails.

Here are a couple of examples, but the main thing is, write a console application and with a hosted service, and add .UseWindowsService() on the end of your Host builder.

https://csharp.christiannagel.com/2019/10/15/windowsservice/ https://docs.microsoft.com/en-us/dotnet/core/extensions/windows-service

An arrow function you pass into forEach is executed for every item in the data array so that you create a new array let array=[] for every item of your original one. You either want to declare the array outside of the function:

So just to clarify some things.

1. SQLite does NOT store things in order based on data. It stores it based on ROW ID. However you can retrieve data and then have sqlite order the returned data based on a column(s) in the sql query.

2. You're asking to insert data and then modify or update that data in a second request. Dataframes doesn't really offer this type of functionally. From what I understand is that pandas can insert to an already existing table or drop the table and insert the new data. So this is something you will most likely have to run raw sql queries to achieve. This post shows someone doing what is called an "upsert" in sql for pandas but required that they create a temp table and use that table to modify data in the original table. How do I perform an UPDATE of existing rows of a db table using a Pandas DataFrame?

You can use .addListener to the TextEditingController on initState.

A bool to change ui, you can use it to set borders color.

Microsoft compiler still did not implement C99 features like VLAs or flexible arrays.

You cant use:

Your issue here is that you haven't closed the parentheses () on the line above the time.sleep.

It should read as below

print('%f\t%f' % (reading, volts))

You have the same issue in the print statement you used when calculating the time difference