All Questions

Just wanted to know if cyclic dependency is something one should avoid in mecroservices design. For example, let's say we have a simple web store that sells fruit. We have Account Service - where ...

A real (but simplified) example from the program that I'm currently working on. We have an abstract Request class and two classes that extend it: FooRequest and BarRequest. They both have dao's used ...

Let's say I have an which is loosely can be represented as: public class AnObject{ public AnObject(String name, String value, UUID id) { this.name = Objects.requireNonNull(...

Are stored procedures considered bad practice in a microservice architecture? Here are my thoughts: most books on microservices recommend one database per microservice. Stored procedures typically ...

I will need to scrap data from different property listing sites and be able to do search by name and location. I do not have much experience in designing the whole system. My initial thought is I ...

I have a web app - it's more complicated than a todo list but for simplicity sake let us assume it is a todo list. The user has the choice to sign up and create an account thus allowing them to store ...

We have 20 docker containers in our application and we have deployed all the containers as AWS Fargate docker containers and it is running successfully. Now we were discussing the auto-scaling ...

I guess the argument for pre-commit hooks that lint and run unit tests would be that every single commit is clean. The argument against them is that they take a lot of time to run, which can add up ...

I have read from many different software architecture books about the "cost of change" and how as developers we need to be wary of this notion and design our software to allow the most commonly ...

I have many years of experience with RDBMS.I am relatively new to NoSQL. And in current project that I am doing, I have to use MongoDB (As suggested by my client). In this there are tens of thousands ...

How is the following expression for the calculation of time complexity correct? 2T(n/2) + O(n) = O(nlogn)

As part of a game engine I am writing in cython, one of the challenges I am facing is creating a consistent interface for error handling that works at the C and python levels of my code. I am ...

We have a system that allows our clients to coordinate people (shoppers) so that they can delivery groceries within 45 minutes from the order creation. Each client has a set of stores where the ...

So I have been working on my mobile app for a while and it is live and in production. Because we released the app prematurely and are continuously improving current features and making them more ...

Suppose I have a Player that wants to build a Tower in the Board of a tabletop game. My first approach to this would have been something like: function onConfirm() { player.consumeResources(); ...

I have a general organization problem with my code. I'm modeling DNA, and I've created a Nucleobase struct to store the "letter" of the DNA. For ease of use, I would prefer the following functionality ...

Background I am starting a new project, and I want custom IOT sensors for an app I am writing. I want to keep everything as simplistic as possible so the IOT devices wont be running any major software ...

I have the following pair of functions used for searching upwards for a configuration file: (defn has-config? [path] contains? (set (.list path)) "my-config") (defn find-config-path [path] (cond ...

Its easy to steal internal hdd, which do not generate sound signals to aware the owner while removing and allows Thief to copy the data. Is there any way by which these thieves acts can be traced.

I have been developing a library with the help of another library. So what I have set up here is two classes sub-classing the library's classes for additional functionality. The problem comes in when ...

Recently, I've been building a search page where the user can input their search criteria and the server side will use a scoring and sorting algorithm to return the 'best' results first. The current ...

I have below two folders Table and Text, which contains below files: Rules - Table - regexTextReplace.php - textReplace.php - Text - regexTextReplace.php - textReplace.php - ...

I'm preparing a session on our product's HLD (High-Level Design) for newbies. It's a microservices-based system that includes several self-managed open-source projects & other managed services (e....

I am currently working on a project to optimize memcached's memory storage algorithm using machine learning. Since I do not own/use any large memcached servers, would anyone be willing to share the ...

I am doing the Ransom Note algorithm in Hackerrank. The thing is I am not using maps and all the tests pass except for three which execution time takes a lot more. (Kotlin language) I have two ...

In postgresql I have a table with a list of cities. One row for city. Around 15000 rows. A column is CITY_NAME, now I have to add an english translation of the city name. The problem is that only 10 ...

We have a system where multiple consumers get messages out of a queue (currently implemented with a database). The messages have an order field. All messages of one particular order should be ...

I develop in an environment where we tend to do a lot of A/B testing. I am curious to learn from others on how A/B testing code is managed in your code base? Do you mix your A/B testing code with ...

My app on cloud foundry runs CPU intensive jobs. A job is a simplified ETL process on flat files or data from an odata service. Today the app is hosted on cloud foundry and is monolithic. Also the ...

I have seen many solutions with the Controllers in a separate assembly, basically Startup and program in one project and the Controllers in another. What are there advantages of doing this? Is this ...

In our history, when we did a new release (deployment) any user who was "logged in" was logged out and that was obviously not ideal. Then I switched platform from a custom stack to a cloud provider ...

Sometimes it is a good idea to have a guard block: https://softwareengineering.stackexchange.com/a/157413 https://en.wikipedia.org/wiki/Guard_(computer_science) Guard block guards against special ...

I am interested in old Intel processors. I'll try to be as concise as possible. 1) In real mode flat model, does the CPU and operating system see all 1MB but only programs see 64KB or the operating ...

I am working on a Symfony 4 rest API application which will be use by multiple client(about 20 different clients). Each client has his specific needs so I have to fork the web application for each ...

By "more object-oriented", I mean, it appears to me testing frameworks like TestNG and JUnit could encourage testers to write implementations of Test and TestSuite interfaces. The current approach ...

I am trying to split down user stories for a brand new system. This system will record weight readings from a balance connected to a serial port. Due to regulatory data integrity requirements - the ...

I've got a console application which pretty much interacts and prepares some data in a SQL Server Database, exports a table, encodes, gzips and uploads to an AWS S3 bucket. The application is complete ...

From my experience, sql code changes almost always tend to be NOT incremental: someone creates a new stored procedure, or modifies an entire embedded sql query for optimization purposes, or creates a ...

With the below pseudo code? Am I breaking any SOLID principles? interface i_pet string get_name() string get_species() color get_fur_color() end interface interface i_cat implements i_pet end ...

When we are working on a big project of C or CPP, we are getting some warning. Therefore, we try to remove that warning because when we see compiler warnings that they make us feel dirty. When we ...

My project is moving from TFS version controlling to GitLab. This is how we used to go about TFS: Each production release will be a version branch. For example, 2.0 for release 1, 2.1 for next and 2....

In the exercice i´m developing bellow, i´m applying the chain of responsibility pattern. The pattern works correctly but i don´t think it's the best approach. I think the rule design pattern should be ...

I am building my own analytics platform, which I want to work like this... A JS script in each of my webpages collects data about users' clicking behaviours and sends that data to a PHP (or other ...

If we have a matrix of nxn, what is the recurrence of splitting it into 4 equal parts of size (n/2)*(n/2)? I thought it would be 4T(n/4) since we are splitting it into a 1/4 of the original size, but ...

I'm looking for a solution for this, buffering messages in an array and send them after web-socket reconnect. I can check the socket client and push messages to an array when connection is lost and ...

I am trying to create an example project Web API to see how "clean" I can remake the Delphi(Pascal) API we are developing on my job. I have created a solution which as of now contains 3 different ...

I am having a debate with someone at work, think I know the answer, but I would like to hear what other people think. If anything, this will confirm that I am right, or show me a better way to ...

Are there any best practices around how specific to make events that are generated administratively, say to clean up after one-off operational issues? For example: Say you have a credit card ...

We’re working on a new service – this service will potentially be called directly from applications on user devices. These applications will be developed and supported by multiple development teams ...

Let's assume we have a required attribute foo for an API call. This can have valid values of 1 and 2 which denote some valid option in the system. Since this field accepts an integer, if we provide ...