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The Art of Debugging: How to Solve Complex Programming Problems
Why every developer should embrace bugs as a learning opportunity!As a Computer Science student at Damanhour University, I have spent countless hours in front of my screen, staring at lines of code that just wouldnât work as expected. Early on, I viewed debugging as a frustrating hurdle. However, as I progressed in my journey with projects like Owlcode, I realized that debugging is actually the core of programming.When you encounter a bugâwhether it's a syntax error in JavaScript or a logic flaw
Building an Automated Invoice Processing Pipeline with Node.js
Accounts payable teams spend an average of 3.7 minutes manually processing each invoice. At 200 invoices per month, that's 12+ hours of data entry. Here's how to build an automated pipeline that brings this to under 10 seconds per document. Pipeline ArchitectureEmail/SFTP/API â Receive â Extract â Validate â Enrich â Store â NotifyEach stage is independent and can fail gracefully without losing the document. Stage 1: Document IngestionAccept invoices from multiple sources:const express
The Making of Owlcode: Merging Design with Functional Logic
As a Computer Science student at Damanhour University, I have always been passionate about bridging the gap between aesthetic design and robust backend logic. My latest project, Owlcode, was born out of a desire to create a clean, efficient tech hub that reflects the evolving nature of digital platforms. In this article, Iâll take you behind the scenes of how this project was built.Building Owlcode wasn't just about writing lines of code; it was about solving problems. The core challenge was to
Is Fable 5 Back?
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Enrich any URL in one request: metadata, tech stack, and a screenshot
I kept reaching for three separate APIs whenever I needed to enrich a URL: one for link-preview metadata, one to detect a site's tech stack, and one for screenshots. Three keys, three bills, three sets of docs. So I combined them into a single endpoint and put it on RapidAPI. This is a quick walkthrough. One call, structured outputThe core endpoint takes a URL and returns everything it can read from the page and its headers. The landing page exposes this as a no-key live demo, so the exampl
Free Developer Tools Network - References, Calculators, Quizzes & More
Free online developer tools and references network. All built with React + TypeScript + Vite, deployed on Cloudflare.Developer References:CSS Reference: https://csskey.com (1,100+ CSS properties)Python Reference: https://python.csskey.com (1,279 pages)JS Reference: https://js.csskey.com (1,345 pages)SQL Reference: https://sql.csskey.com (816 pages)HTML Reference Hub: https://html.csskey.com (1,250 pages)Linux Reference: https://linux.csskey.com (363 pages)Emoji Reference: https://emoji.csskey.co
Free Developer Tools Network - 14 Sites Built with React + TypeScript
I built a network of free developer tools and reference sites. All client-side rendered SPAs deployed on Cloudflare.Technical Highlights:Server-side canonical injection via Cloudflare FunctionsOrganization, WebSite, FAQPage, HowTo structured dataDynamic content templates generating 200+ unique words per pageReact 19 + TypeScript 6 + Vite 8Reference Sites:CSS Reference: https://csskey.comPython Reference: https://python.csskey.comJS Reference: https://js.csskey.comSQL Reference: https://sql.csske
How I Convert Excel to PDF in the Browser with Vue 3, xlsx, and html2pdf.js
I needed a dead-simple way to turn spreadsheets into PDFs without sending them to a server. Most tools want you to upload the file, wait for processing, then download it. For invoices, budgets, and payroll sheets that's a dealbreaker.So I built en.sotool.top/excel-to-pdf/ â pick a spreadsheet, preview it, get a PDF. All in the browser. No server involved.Here's how it works under the hood with Vue 3, xlsx, and html2pdf.js. Why Client-Side?The obvious reason is privacy. Financials, payroll,
The Code AI Won't Write
I use a form validation problem as a technical interview question. It's deceptively simple â and the solutions people reach for reveal a lot about how they think.Then I tried it on Claude, ChatGPT, and Gemini. The results were illuminating, but not for the reasons I expected. The ProblemMany form libraries share a common convention: form data is represented as a plain nested object, and the validation function returns an object of the same shape containing the errors. You'll find this patte
Focus Issues and Refinement Support
PrologueA while ago, I decided to develop a fully accessible main navigation component in React and write a series of articles documenting the steps it took to create a non-trivial accessible component.My last development article completed the base requirements for keyboard functionality within the component; attention now shifts to adding some of the last functionality required, closing sublists when the lists holding them now close and determining what happens when a closed component is entere
Top 6 Advanced React Data Grids for Performance & Scale
Comparing the Performance of Top React Data Grids Why Grid Performance MattersIf youâre comparing enterprise-level data grids for your React application, performance should be your top consideration.In data-intensive applications, data grids are becoming vitally important for helping users visualize, manage, and analyze large datasets. Performance becomes even more critical when applications update or stream large volumes of data in real time and users expect immediate responsiveness.
Understanding Forms in React
Understanding Forms in ReactForms are one of the most common ways users interact with web applications. Whether it's a login page, registration form, search bar, or contact form, React provides a simple and efficient way to handle form data. What is a Form in React?A form is used to collect user input. In React, form elements such as <input>, <textarea>, and <select> are typically controlled using state.Example:function LoginForm() { const [username, setUsername] =
I Built a Physics Simulator + Color Mixer in One HTML File
Star the repo on GitHub! âLive: universal-cyber.github.io I wanted to understand three things game developers need to know: physics simulation, graphics rendering, and performance. So I built a single-file web app that does all three.No npm. No build tools. No dependencies. Just ~500 lines of JavaScript in one HTML file. What It DoesDrop objects from different planets â Watch gravity, drag, and terminal velocity in real-time as objects f
How I Built an AI Translator in 2 Hours
<p>I needed a fast AI translator for indie projects. Instead of paying $20+/month, I built one in 2 hours. Try it free: <a href="https://aisense.top/tools/ai-translator" rel="noopener noreferrer">https://aisense.top/tools/ai-translator</a> #buildinpublic #ai #webdev</p>
Objects in JavaScript
Introduction to the JavaScript objectsAn object is an unordered collection of key-value pairs. Each key-value pair is called a property.The key of a property can be a string. The value of a property can be any value, e.g., a string, a number, an array, and even a function.JavaScript provides you with many ways to create an object. The most commonly used one is to use the object literal notation.The following example creates an empty object using the object literal notation:let empty = {};To crea
Open-Source JavaScript Data GrâŚ
Originally published at norvik.tech IntroductionExplore the intricacies of an open-source JavaScript data grid, its architecture, and its implications for web development. Understanding the Open-Source Data GridThe open-source JavaScript data grid serves as a fundamental component in data-heavy applications. It provides developers with the tools to manage and display large sets of information efficiently. As noted in the original article, every data-heavy product inevitably relies on t
Stop Wasting Renders: How to Handle Complex REST APIs in Your Frontend
React REST API render optimization comes down to three problems: mixing server state with client state in useState, firing network requests on every component mount because staleTime defaults to 0, and creating request waterfalls through nested component data fetching.This article covers the three architectural patterns that cause render waste when integrating REST APIs in React, and the exact production fixes for each. You will come away knowing how to separate server state from client state, c
Mechanical Watch (2022)
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Lazy Loading in React: Improve Performance with React.lazy() and Suspense
IntroductionWhen a React application is running, its partial load time increases due to the large JavaScript bundle size. The result is that users have to download more code before they can interact with your application, resulting in slower load times and a poor user experience.One of the easiest ways to improve performance is Lazy Loading, which allows components to be loaded only when they are actually needed.In this post, we'll learn how to implement lazy loading in React using React.l
Correlated randomness in Slay the Spire 2
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