akin | js Recommendation Engine based on Collaborative Filtering

I'm using a task that creates other tasks. Those tasks in turn may or may not create subsequent tasks. I don't know beforehand how many tasks will be created in total. At some point, no more tasks will be created, and all the task will finish.

When the last task is done, I must do some extra stuff.

Which threading mechanism should be used? I've read about CountDownLatch, Cyclic Barrier and Phaser but none seem to fit.

I've also tried using ExecutorService, but I've encountered some issues such as the inability to execute something at the end, and you can see my attempt below:

Good day, everyone. Hope you're doing well. I'm a Django newbie, trying to learn the basics of RESTful development while helping in a small app project. We currently want some of our models to update accordingly based on the data we submit to them, by using the Django ORM and the fields that some of them share wih OneToMany relationsips. Currently, there's a really difficult query that I must do for one of my fields to update automatically given that filter. First, let me explain the models. This are not real, but a doppleganger that should work the same:

First we have a Report model that is a teacher's report of a student:

hopefully there is someone here with enough experience to guide me through this particular issue I've found. So I am working with this peculiar API that returns an object akin to the following:

In Visual Studio 2019, it likes to try to guess where it should put the semicolon when you hit it. Often it will jump to a completely different line or insert newlines. Every time it does anything besides append it as the next character, this is extremely disruptive, and I have to go back and fix what it broke. This is akin to the disruptive "Automatic brace completion" which always puts braces where I don't want them, but can be turned off. I can't find anywhere to turn off the semicolon behavior. Is there any way to turn this feature off?

Most of the time when the semicolon misbehaves, it's because I hit it by mistake, but rather than hitting backspace, I now have a bigger mess to clean up. And I've never had a situation where it did something extra that I wanted it to do.

Some examples, with * being the cursor location:

I'm currently teaching myself Rust and am practicing by implementing Tic-Tac-Toe.

I have a Board struct (Cell and GameState are straightforward enums, SIZE is 3 usize):

I want to employ GitLab CI/CD for a test that involves two containers. The test requires that both containers are up and that a script is then run in one of them (with semantics akin to kubectl exec ... script.sh or docker exec ... script.sh). I've tried modeling this with services thanks to a previous answer received:

I am building something like an ActiveRecord class for documents stored in MongoDB (akin to Mongoose). I have two goals:

1. Intercept all property setters on a document using a Proxy, and automatically create an update query to be sent to Mongo. I've already found a solution for this problem on SO.

2. Prevent unnecessary reads from the database. I.e. if a function is performed on a document, and that function only ever sets properties, and doesn't ever use an existing property of the document, then I don't need to read the document from the database, I can directly update it. However, if the function uses any of the document's properties, I'd have to read it from the database first, and only then continue on with the code. Example:

   ...

I have a very specific Tomcat configuration that I don't want to change and I am looking for a solution for this specific configuration.

I have declared multiple contexts () for deployment inside the conf/server.xml file in Tomcat, something I know is not recommended. My problem is that if one of those deployments fail, the whole Tomcat process stops which terminates the rest of the applications that have successfully started. Is this behavior expected? Is there an attribute or a way to prevent this and emulate the behavior of distinct context declarations akin to the usage of context.xml file?

The error I'm getting is the following:

ConfigServletWebServerApplicationContext : Exception encountered during context initialization

with this stacktrace (for Tomcat version 8.5.24):

I have a matrix that is 10 rows by 4 columns. Each row represents a user, and each column a measurement. Some users only have one measurement, while others may have the full 4 measurements.

The goals I want to accomplish with this matrix are three fold:

1. To subtract the user's measurements from their own measurements (across columns);
2. To subtract the user's measurement from other user's measurement points (all included, across rows);
3. To create a final matrix that counts the number of "matches" (comparisons) each user has against themselves and others.

Within a threshold of 2.0 units, I have tried to measure each user's measurement against their own measurement and other users by obtaining the difference with a nested for-loop.

Below is an example of what the clean_data matrix looks like, and this matrix was used for all three goals: