risk | A game of Risk played on a hexgrid | Reactive Programming library

I have sentences from spoken conversation and would like to identify the words that are repeated fom sentence to sentence; here's some illustartive data (in reproducible format below)

I am trying to dynamically generate the following html table, as seen on the screenshot

I was able to manually create the table using dummy data, but my problem is that I am trying to combine multiple data sources in order to achieve this HTML table structure.

SEE STACKBLITZ for the full example.

The Data looks like this (focus on the activities field):

I have a question regarding Room and it’s withTransaction { } code block in combination with Koin.

I have a repository where I need to access a couple of DAOs at the same time. I wanted to work with a withTransaction { } so I wouldn’t clutter 1 DAO with references to other DAOs. I’m not sure which object to inject in the constructor of my repository. The withTransaction{ } can only be accessed by getting the RoomDatabase. But having the RoomDatabase in my Repository means that I have access to all the DAOs connected to that RoomDatabase. I’m not sure what the best practice around this use-case would be.

Should I use the withTransaction { } and risk that all DAOs are accessible be that Repository or should I have the DAOs in my Repository's constructor and hand them to the `ReviewDao' to handle every insert?

An example would be something like this with withTransaction { }

I'm trying to learn Flask and use postgresql with it. I'm following this tutorial https://realpython.com/flask-by-example-part-2-postgres-sqlalchemy-and-alembic/, but I keep getting error.

From "C++ Concurrency in Action" by Anthony Williams.

The author defines a thread_guard class which, is passed a reference to a std::thread upon construction, and upon destruction, attempts to join() that same thread.

Here is the definition

Story: in my java code i have a few ScheduledFuture's that i need to run everyday on specific time (15:00 for example), the only available thing that i have is database, my current application and openshift with multiple pods. I can't move this code out of my application and must run it from there.

Problem: ScheduledFuture works on every pod, but i need to run it only once a day. I have a few ideas, but i don't know how to implement them.

Idea #1: Set environment variable to specific pod, then i will be able to check if this variable exists (and its value), read it and run schedule task if required. I know that i have a risk of hovered pods, but that's better not to run scheduled task at all than to run it multiple times.

Idea #2: Determine a leader pod somehow, this seems to be a bad idea in my case since it always have "split-brain" problem.

Idea #3 (a bit offtopic): Create my own synchronization algorithm thru database. To be fair, it's the simplest way to me since i'm a programmer and not SRE. I understand that this is not the best one tho.

Idea #4 (a bit offtopic): Just use quartz schedule library. I personally don't really like that and would prefer one of the first two ideas (if i will able to implement them), but at the moment it seems like my only valid choice.

UPD. May be you have some other suggestions or a warning that i shouldn't ever do that?

According to the libevent book:

Deferred callbacks

By default, a bufferevent callbacks are executed immediately when the corresponding condition happens. (This is true of evbuffer callbacks too; we’ll get to those later.) This immediate invocation can make trouble when dependencies get complex. For example, suppose that there is a callback that moves data into evbuffer A when it grows empty, and another callback that processes data out of evbuffer A when it grows full. Since these calls are all happening on the stack, you might risk a stack overflow if the dependency grows nasty enough.

To solve this, you can tell a bufferevent (or an evbuffer) that its callbacks should be deferred. When the conditions are met for a deferred callback, rather than invoking it immediately, it is queued as part of the event_loop() call, and invoked after the regular events' callbacks.

As described above:

1. The event loop fetches a batch of events, and processes them one by one immediately.
2. Before the fetched events are processed, any new event won't be fetched and processed.
3. If an event was marked as BEV_OPT_DEFER_CALLBACKS, then it will be processed after all other events in the same batch are processed.

Provided two callbacks ca and cb. First, ca is called, ca finds evbuffer_A is empty, then writes a message into it.

Then, cb is called, and cb finds evbuffer_A contains a message, then fetch and send it out.

When cb is called, ca's stack has been released. I think there won't be a stack overflow in such a scenario.

So, my question is:

What's the purpose of deferred callbacks in libevent?

I created table of 500 rows, and reversing it on click feels slow, subjectively like 500ms or so.

Is it reasonable performance? I have a feeling that reversing table of 500 lines in JS should be faster.

Svelte demo and Pure JS demo.

Pure JS feels much faster than Svelte

Table.svelte

I am building a version of Risk in JavaFX with FXML for school. Now we want to be able to right click a button to decrease the amount of troops in a country and left click it to increase the amount. The left click was pretty self explanatory as it is just an onAction, but how would we check for a right click on a button, through FXML?