All Questions

When I'm designing a system for a program, I often make misjudgements that will prevent the design from either working, being maintainable, easy to use or all the above. This means I will usually have ...

I have used this design pattern in several entity-component designs. Now I want to introduce it to my team: It concerns a type-of relationship, where the instance structure and the type structure are ...

We are decomposing a monolithic legacy system into microservices. As we do so, we can't completely remove reliance on some of the data in the legacy system that's required for each microservice. ...

So my view model like this: final class ViewModel { let reloadData = reloadDataRelay.asSignal() private let reloadDataRelay = PublishRelay<DataEntity>() let closeSession = ...

I'm designing an application in a micro-service architecture and I have some questions regarding error codes. Found some information about it (1,2) - but more focused on the responsibility of the ...

I have gone through similar questions on this site and stackoverflow.com, but because I am still curious and want to cover all possible spectrums of this design, I am asking this question. I am ...

It seems like the consensus is to learn by doing when it comes to programming, well that seems like the advice given to most beginners. How will beginners learn to write efficient code when they dive ...

We have a legacy order system and a new order system that are both currently active. The legacy order system takes 'offline' orders still, the new order system handles 'online' orders but uses the ...

In general, should I use variable length arrays or malloc? In my specific case I am processing files of very short to very large sizes. Also if I compile on version MacOS 10.15, and then run on 10.13, ...

I am coaching a client who is reorganizing their Program and could use some advice. Background: The client works for a large corporation with many different programs that all take their own approach ...

Why will it take that long to transition all Mac software to ARM according to Apple? I thought all they would need to do is to recompile the source code of their apps and rewrite SIMD code from intel ...

I am writing a function that I would not like to get called given a certain context and am wondering how best to convey that to possible users of the function. Assume, for exemplification, I am ...

The following code works and is clear, but it's also verbose. I suspect that there's a way to make it more terse, so that it could be skimmed quickly and it'd be more obvious what's happening. // The ...

Given a minimum spanning tree in an unweighted graph of (10 .. 500) vertices and (vertice_count .. 1000) edges. Each vertex can have up to 6 edges. Given K agents/bots/processes/etc.., all starting ...

I m looking a way to design a system that can provide a linear and incremental counting for invoice number accros a scalable system. At this time, i have four pools of two servers (two pool for europe ...

I have a simple app which has the following architecture: front-end api/ back-end server.py api/ utils/ The app is already using http based server which is started/configured in the ...

Reading the Google C# style guide I came across this: Generators vs containers Use your best judgement, bearing in mind: Generator code is often less readable than filling in a container. Generator ...

Inversion of control is reading .xmls files, these files are templates for the container. Input for IOC: Directory path, Then service iterate on all .xml in that directory and register them, each xml ...

That is quite specific circumstances I've come across, and I somewhat struggle to find proper way how to approach this. I'm given a class written in swift-language, which has a control property, like ...

I have a big backlog of tasks gathered during last years. And new tasks are added occasionally. All tasks have the same priority and tasks never expire over time. I was thinking of the reasonable way ...

Background: I have a JSON object (named JSONConditionObject) which looks like the following, { "condition1":"value1", "condition2":"value2,value3 ..." ...

Display devices have their own PPI.Do these devices respect the DPI information of image file? If not, then what is use of"DPI" of image file? example: Image file- height: 1200 px width: 900 ...

I am developing a library for an embedded system with very little storage in C++. I would like to declare an array for a specific use in one function, however I am unsure if I should declare this in ...

How do I achieve two things at the same time writing Java Spring Application: Clean Architecture JPA goodies (@Transactional, Optimistic Locking, dirty checking, etc.) I like the idea of database/...

I'm trying to understand useEffect a bit more. I was tripped up a few months ago before realizing that useEffect hooks run after all other hooks. I would now like to know whether or not React will ...

If I have a IRepository that Create,Update,Delete and Get an entity from the database and I do a fake for it with a public List inside it. If I am testing a command that is using it: is a bad ...

I'm working on an app where we need to use different authentication flows depending on how the user is accessing the app. I want to make sure that there is only one instance of the authentication ...

When using a centralized version control system such as SVN, where every commit acquires an auto-incremented number, it is relatively easy to track what version is released to production by simply ...

TLDR: Does using DB objects as my AggregateRoot lead to bloated God objects. In comparison to the issues I see in using separate DbObjects and DDD objects. I'm trying to bring together my ...

I am designing an application whose main function is to trade cryptocurrency across different exchanges. I have defined Exchange as one of my core domain objects, with two public methods that revolve ...

I know that user stories and use cases are written by a customer not the development team alone. And I know that on each iteration the development team picks a number of requested use cases and ...

I'm just curious, I'd like to understand how compiled code works from the moment I run an executable file. Some time ago I had found a very well written article which helped, using a hex editor, to ...

Say I have a domain entity User: class User { constructor (username, email, password) { this.username = username this.email = email this.password = password } } Now, all users need a ...

I've encountered several scenarios that require me to mock certain helper methods because they call outside resources. As a result, I'm forced to convert all my helper methods from private into public....

So this is an example endpoint to fetch one user by its username [HttpGet("{username}")] public async Task<ActionResult<object>> GetUser([FromRoute] string username) { // ... ...

(I’m trying to phrase this question to be as specific as it can get, but since I’m mostly interested in high-level design it might be a bit still too vague. Let me know if I need to edit it or specify ...

Assume there's some code that's already in production that needs some unit testing. Generally speaking, would you want to refactor this code that's already in production by adding things like adding ...

A few months ago I found a presentation with slides about the benefits of migrating to the cloud. I think that the presentation was maybe quite old but I think that it started with arguing that ...

I keep reading about "well defined interfaces", as here, here or here, specially when talking about microservices. What's an example of the opposite, an interface that is not well-defined?

I am creating a web app with JS and PHP where users can edit a file similar to a text editor such as notepad. I've decided to use a database to store these files. One of the primary functions of a ...

I developed a Open Source Software in Electron and would like to add some paid functionalities to it, which target large companies. How could I add "Premium Features" to an Open Source ...

My job requires me to know how to work with Ruby, Python, Bash, Puppet, Golang, MySQL and occasionally Scala and PHP. Yes I really do have projects including most of these and there are weeks where I ...

I'd like to know some best practices on how to build rest API for a backend which shall communicate with a mobile app by anonymous users. This is the scenario with details: I'm building a demo library ...

I want to connect simple python code to HTML, so it's executing the function accordingly to the user's input. Then, it returns the output of that function back to HTML. More specifically, I want my ...

I know my question sounds a bit weird so I will try to explain my issue with examples. In my application, I have two types of business objects : Shops and Customers for example. Both of them can be ...

What is the best way to implement a app store in a SaaS application? For example, say you have an ERP application and you want to allow external accounting systems to integrate into your application. ...

Let's take Shopify. They consider a shopping cart abandoned right after a customer has entered their email at the 1st step of checkout. I think it's wrong because a customer might need at least 5-10 ...

I've been trying my hand at building apps with Flutter and Dart. I noticed in my apps that if someone decompiled my app they could access a whole lot of things I didn't want them to access. For ...

I want to make a service that is supposed to upload Photos in S3 and make them available using a link. I have few design plans for my service. PLAN 1: Upload photo to my REST API which will update ...

My project uses Microsoft SQL Server Express 2019 as data-engine and potentially will be migrated to other data-engine. The database used in the vb.net Desktop application. Tables usually contain an ...