CodeEveryDay

#15 SOLID Principles: The 5 Rules Every Developer Should Know 👇🏾 SOLID principles are the backbone of clean, maintainable software design. Whether you're preparing for a technical interview or aiming to write better code, these five principles — introduced by Robert C. Martin — are essential to master. Let's break them down. #SOLID #CleanCode #SoftwareEngineering #CodingInterview #OOP #DesignPrinciples #Programming #SoftwareDevelopment #TechInterview #CodeQuality #BackendDevelopment #LearnToCode #SoftwareArchitecture #BestPractices

#14 Factory Design Pattern (Creational Pattern) 👇🏾 The Factory Pattern is a creational design pattern used to create objects  without exposing the concrete implementationto the client. Instead of instantiating classes like creditCard, paypal, or crypto directly, the creation logic is delegated to a Payment Factorythat returns a Payment interface. --> Why use Factory? Decouples object creation from usage Makes the code easier to extend Respects the Open/Closed Principle --> Common use case: A payment service factory that returns the correct implementation based on a condition (user choice, configuration, request type). Example: Payment (interface) creditCard / paypal / crypto All implementations expose the same method: pay() #SoftwareDevelopment #Programming #DeveloperLife #CleanCode #DesignPatterns #ObjectOrientedProgramming #BackendDevelopment #FactoryPattern #CreationalPattern

#13 Singleton Pattern (Creational Pattern)👇🏽 The Singleton pattern ensures that a class has only ONE instance and provides a global access point to it. -> Main benefits: Single instantiation → lower memory usage No repeated object creation → better CPU performance Centralized access to a shared resource -> Common use case: A service such as application configuration, logging, or a database connection that is used across the application but instantiated only once. #SoftwareDevelopment #Programming #DeveloperLife #CleanCode #DesignPatterns #ObjectOrientedProgramming #BackendDevelopment #WebDevelopment

#12 Design Patterns are everywhere in software development! 👇🏽 There are 3 main types: Creational → how objects are created Structural → how classes and objects are organized Behavioral → how objects communicate Mastering these helps you write cleaner, maintainable, and scalable code #SoftwareDevelopment #Programming #DeveloperLife #CleanCode #DesignPatterns #ObjectOrientedProgramming #BackendDevelopment #WebDevelopment

#11 Promise, Future && Deferred: Handling Asynchronous Results 👇🏽 A Promise (JS/TS) represents a value that isn’t available yet — like a variable waiting to be filled later. It starts in a pending state, then becomes fulfilled (success) or rejected (error). You handle these outcomes using .then() and .catch(). The broader concept exists in many languages under different names: JavaScript / TypeScript → Promise Python → asyncio.Future C# → Task Java → CompletableFuture Kotlin → Deferred Rust → Future In short: a Promise is just JavaScript’s version of a universal “future result” pattern. #JavaScript #TypeScript #Promises #AsynchronousProgramming #WebDevelopment #CodingEveryday #SoftwareEngineering #LearnToCode

#10 Stateful vs Stateless: understanding the difference in 10 seconds We often encounter these two terms during our studies or in the workplace. Yet, the distinction can remain unclear. Here’s a simple explanation to help you visualize it — along with my short flow animation 👇🏽 🟥 Stateful The server keeps the state between each request. It stores user information (session, context), allowing continuous tracking… but it makes scalability more complex. 🟦 Stateless The server keeps no state. Each request is independent and contains everything it needs. Result: easier to distribute, simpler to scale, and widely used in modern APIs. #softwareengineering #backenddevelopment #architecture #stateful #stateless #cloudcomputing #webdev #api #programming

#Story_4 Samantha’s daily mission: automate employee attendance reports 👇🏼 👩🏾💻Samantha works in a busy administration office. One of her main tasks is recording employee attendance. Every day, she updates an Excel file on her computer with all employees’ presence, then uploads it to the server for managers. Doing this manually every day is repetitive and time-consuming. So Samantha decides to automate 🕙 the process with a simple script and a cron job, scheduled every day at 2 PM. #Linux #Automation #CronJob #Excel #DevLife #CodingTips #Productivity #SysAdmin #WorkSmart #TechStory

#Story_3 CoolTool Installed, But Where’s My PATH? 🧑🏽💻Bob, a passionate but slightly distracted developer, decides to install CoolTool on his favorite Linux system. He follows the instructions 👇🏼 #Linux #DevLife #Programming #CLI #TerminalTips #Zsh #PATH #SoftwareInstallation #Coding #TechHumor

#Story_2 Locate & Copy! – How Alice Retrieved the Missing File👇🏾 It’s Friday afternoon, and 👩💻  Alice is about to leave the office. Before she goes, she has one last task: She must connect to a Linux server (terminal only) and find a file called report.xlsx. The tricky part? She forgot where it is. Once found, she needs to copy it to her laptop into the Documents folder, because she’ll be working remotely on Monday. Here’s how she solves it step by step: #Linux #SSH #Terminal #SysAdmin #DevOps #Programming #Productivity #RemoteWork #FileManagement #TechTips

#Story-1 – Alice & Bob: The Secret Linux Mission. 👇🏾 👩💻 Alice is on a mission : write a super-secret report on the company server. Only 🦸♀️ Bob is allowed to peek or edit. Everyone else? Not a chance! Story insight: →👩💻Alice controls who can access the file → only Bob can read/write. →Everyone else → no access at all. →Bob receives an email and rushes to edit the file like a true sidekick 🦸♂️. Fun twist: The other users just see… nothing. Not even a clue that a report exists! #Story1 #Linux #Bash #ServerLife #FilePermissions #DevHumor #CommandLine