All Questions

Let's say your organization uses a blue-green deployment model. Simple question: After Blue has gone live, do you rename it to Green, and the server(s) formerly known as Green now becomes Blue? Or ...

I am not sure how to explain my problem, but basically I have an input field which lets you enter member's name or select one from a dropdown list. If the user has selected the person from the list ...

I have been developing with Orleans actor implementation. Recently, I saw that we were scheduling a long running job on an actor, which was effectively blocking the actor since it couldn't process the ...

What is the stand on initiating the class from its own static method? Are there any good practices about this? I feel need of initiating a class from its static method while implementing a job ...

I have a tree of Installations: Aggregate Installation has a property ParentInstallationId. I also have a RemoveInstallationCommand --> repo.GetInstallation(x).Remove() Now, I want to throw a ...

I'm trying to implement a simulation of Mastermind in Java, for educational purposes. My version is slightly different from the original as more players can participate in a single match and try to ...

We have an ecommerce website which has navigation menu consisting of several categories which keeps on changing over time. Presently catalog team passes requests to turn on/off categories to tech team ...

Is a Complex Type to the Entity Framework, what a View Model is to a View? If I understand, the Complex Type is a type that represents columns and/or fields from real EF entities. A View Model is ...

In java, unreachable code is considered a compile error. For example, this code would not compile: private static int double(int x) { return x * 2; x += 5; } As x += 5 can never be reached. ...

Imagine a page with an autocomplete textbox on it, to get Customer. I am wondering what sort of limit for record size makes sense in this day and age regarding whether all the customers should be ...

Let's assume the following architecture where EventCreatorApp creates an Event which is logged to DB and sent to WorkerApp for processing WorkerApp processes the event, handles failures, etc. ...

I am looking for some advice on the best way to manage my development worflow. I have been using git locally to track development and have recently uploaded a couple of private projects into Github. ...

I'd like to build a rest service that will accept objects that has digital signature. This service has to support both xml and json data serialization formats. I'd like to use .Net core framework to ...

To clarify the question here is the scenario. There is a web app which implements RESTfull API with JWT authorization. It runs on PHP/mySQL at the back and Angular2 in front. Then comes another app ...

I often find myself creating classes that I suffix with 'Factory'. These classes tend to be solely in charge of the creation of a specific class or set of related classes. However I've always felt ...

In JavaScript (ES6), I can have optional function parameter with default value. So to add a new behavior to the existing code base, I could either introduce new method(s) or extend the existing method ...

In Big Bang Integration Testing, we combine all the modules we have together after unit testing immediately as one whole to see if there are errors. In System Testing, we basically test the whole ...

Why aren't compilers for Python common? And why interpreters for C aren't common either? Assuming that a compiled-to-machine-code Python program runs faster, why aren't Python compilers common? After ...

I've been reading on the Command pattern. One of the advantages listed is that you can change the commands at run time and avoid hard coding invokers to receivers. But when do you really need to do ...

Say there are two microservices (example is simplified) PickupRequestService: lists pick-up requests of passengers DriverService: drivers use to accept pickup requests On a completely decoupled ...

We use a Kanban process with the following steps: (backlog) specification implementation review (completed) The specification, implementation and review steps are divided in in progress and done ...

Forward I've read a lot of things before asking this question, including many relevant questions right here on SE: (Software Engineering SE) Writing tests for code whose purpose I don't understand (...

I have a few questions regarding the versioning in the microservices architecture: Let's say there are three services - S1, S2, S3 S1 calls S2 and S3 to generate a response R1. Service S2 generates ...

Background: The application is a web map application with a LeafletJS front-end and NodeJS back-end with Postgres database. The application is to be used on both desktops and smartphones/ tablets in ...

As I am maintaining and extend a software system in Java, I saw a colleague (who left due to retirement) implementing a table with a generic approach. This approach is unluckily bound to tables (ui-...

I'm trying to get my head around Python exceptions. I've read quite a bit on the topic but can't get clear answers to some questions. In particular, I'm still not sure whether to use exceptions or ...

I hit an API which gives a list of chairs with their location. I save this data in my local database. Whenever I received updated data like add a new chair, update location of the chairs and delete a ...

MongoDB recently announced their new field-level-encryption method for helping tackle DB breaches. (https://www.wired.com/story/field-level-encryption-databases-mongobd/) In other articles it is ...

I working on a project requiring quite a lot handlers to handle requests. In general, i'm comunicating with a communication card, receiving requests from any source (User Interface, Server it doesn't ...

I'm building a shop system which works in three parts: a mobile app (Android/iOS) which is used by customers to make orders, view products and so on, a desktop application, used by the managers to ...

I understand what oauth2 is and I've programmed it in one of our projects. The point was to pull user's data from an oauth2 provider (facebook, google, etc.) to our application (for example, the user'...

I have a database of people. With the information such as their name, online presence / relevance, and social media accounts, I want to create an engine that will automatically "describe" the person. ...

I'm writing a pet project to scrape some websites, and write out results to HTML. Currently my data model and interfaces are: class Post: def __init__(self, title, description, images) ...

I'm building a web application, in which users have their own set of Topics. Since Topics are recorded for reporting purposes, it's important that Topics used previously are not deleted, so that they ...

I'm currently developing a Hololens application and I've used Microsoft's official spatial anchor documentation to create a voice command that can persistently anchor a GameObject in place. So if I ...

I have two classes. A Bot class and a Client class. Heres a relevant section of the Bot class. class Bot { constructor(client) { this.client = client; this.client.on(ChatEvent....

I have found a similar question but did not quite understand the Affero section. My code depends on some GPL v3.0 lib from GitHub that has the following clause in License: 13. Use with the GNU ...

I am reading more about the differences between syntax and semantics, but I am still wondering about this one. Let's assume that we have a language that only allows integers to be in the range of 0-...

I have a class of (flat) objects that are going to be passed around between three different parties, each possibly running a different software stack. my_object: item: "string_a" money: ...

I am looking into REST API alternatives and am having trouble finding info on if/how people do it for exposing services to third parties. Say there is a service that requires large complex/nested ...

I want to make an application with a GUI in a way that most of its code is independent from the GUI used (let's say I'll use Java 8 and Swing for example). I have some methods with try/catch blocks ...

My app should populate UpdatedBy field for all of the entities. UpdatedBy should reference Id of AuthUser which extends IdentityRole<int>. UpdatedBy is set in IdentityDbContext.SaveChanges(). ...

We have a very small team: me, my 2 coworkers who are both my senior by over a decade, a web designer who usually works on marketing material but also does some graphical mock-ups or minor graphical ...

I have a micro-service that sends files to clients on request. It acquires these files by querying a database where other users have saved details of the file. The micro-service queries the database ...

I'm developing an application using CQRS + ES. Now I have 2 aggregates which are technically almost exactly the same, only they are different concepts in the domain. Therefore I will separate them ...

Bloom filters are used for pattern matching in Bioinformatics.Bloom filters are probabilistic data structures.So my question is what is the best hash function to use for bloom filters to get better ...

Most of the express error handling documentation and tutorials I've read suggest using Express middleware to throw errors up to, and to handle the errors there. eg. From the Express documentation: ...

I have an WebAPI application which is consumed in our native apps. The implemented auth grant type is 'password'. It is working fine. Currently we are creating a native library instead of native apps ...

I have a little app(PHP) that uses data from a third party. That data is processed constantly and saved into a database. And now i want to create a RESTful API to allow access to that data. Should i ...

Issue: I have a list of a class that's being displayed in a Datagrid, one of the values needs to ask the user if they really want to change it. This was implemented with a YesNo MessageBox in the ...