Understanding Iterators and Iterables in JavaScript for Performance

Let me confess something......... In my early days, "React", "TypeScript", "Next.js" and "DSA" looked shiny and exciting. Meanwhile, I was still fighting Javascript and stuck in tutorial hell, hoping the next video would finally make sense. It never did......!!!! I barely understood my own code, but I still believed I “knew Javascript.” Eventually I realised No one knows a language 100%. 50% simply means everyone is always learning, because this field never stops evolving. I used to avoid documentation, but "MDN docs", "javascript.info" and many other Documentations changed everything. Concepts finally connected. Errors made sense. And even if you love “vibe coding,” fundamentals are what save you. They reduce your 10 AI prompts to 2. AI will not replace you now, it will just watch you write longer prompts. So if you are starting out Just Remember these slow down, learn your basics, and read documentation. #GoingBackToBasics #Frontend #JavaScript

The 24 hour JavaScript Engine. Just for the hell of it, I pushed my JavaScript Engine experiment further. I have pretty decent coverage of JS features now. * Event loop * Promises * Async Await ( CPS Transformers ) * Generators ( CPS Transformers ) * Class syntax, with inheritance It´s been an interesting thing to play with. It really does help to have the proper background in languages, interpreters and compilers. It all runs on-top a form of LISP-like engine. JavaScript code -> JavaScript AST -> S-Expressions -> CPS Transformer -> S-Expression evaluator engine. There are probably conceptual things in that decision that will be hard to align with strict JavaScript. I don´t know the edgecases or details of JS that well. But so far it has worked out incredibly well. Some funny takeways. Due to the expression-first approach in the inner engine, every expression is evaluated recursively. This means there is no way "break out" of a function. e.g "return" inside nested conditionals. The AI solved this though. Using Exceptions in .NET. Setting up Try Catch for specific "Signals" in the evaluator. Then when it returns a value, it actually throws an exception holding on to the result. Catching it where the consumer of that value sits. Very Similar with "continue" and "break" statements. This is of course not performant in any way, but it does work. surprisingly well too. Either way, it´s a toy project. just prompting. If anyone is interested in languages, parsing, interpreters. or just want to play with it, here is the code: https://lnkd.in/dTwzgqwu

Anders Hejlsberg began working on TypeScript in 2012 with a specific goal in mind: addressing a practical challenge rather than creating a competitor to JavaScript. At that time, JavaScript was pivotal to web development, yet it faced limitations in scaling for extensive, collaborative code projects. The industry witnessed the delivery of vast amounts of weakly typed code, leading to complexity beyond manageability as systems expanded. https://lnkd.in/guf6_kEu #javascript #frontend #typescript #ai

💡JavaScript Reboot: JavaScript's New Era, ECMAScript 2025 + AI Magic🤖 🚀 JavaScript in 2025: ECMAScript Leaps & AI-Powered Apps! Just dropped: JavaScript’s ECMAScript 2025 update is packed with brand-new features that make coding cleaner, faster, and more advanced. 💡Highlights: - Pattern Matching for smarter, readable conditionals. - Immutable Records & Tuples for superstable data. - Async upgrades for smoother APIs. - Powerful new Set methods (union, intersection, difference) - Promise.try() for error-handling made easy But that’s not all! 🤖🛠️ AI is now woven into the JavaScript developer toolkit: with TensorFlow.js and generative AI APIs, you can build 🧠 Intelligent, interactive web apps right in the browser—NO BACKEND REQUIRED 🚫🖥️(lightweight tasks and interactive web experiences). Are you using these features or building with AI in JS? Please feel free to comment and share your thoughts. 😊

🚀 Deep Clone an Object in JavaScript (without using JSON methods!) Ever tried cloning an object with const clone = JSON.parse(JSON.stringify(obj)); and realized it breaks when you have functions, Dates, Maps, or undefined values? 😬 Let’s learn how to deep clone an object the right way - without relying on JSON methods. What’s the problem with JSON.parse(JSON.stringify())? t’s a quick trick, but it: ❌ Removes functions ❌ Converts Date objects to strings ❌ Skips undefined, Infinity, and NaN ❌ Fails for Map, Set, or circular references So, what’s the alternative? ✅ Option 1: Use structuredClone() (Modern & Fast) Available in most modern browsers and Node.js (v17+). structuredClone() handles Dates, Maps, Sets, and circular references like a champ! structuredClone() can successfully clone objects with circular references (where an object directly or indirectly references itself), preventing the TypeError: Converting circular structure to JSON that occurs with JSON.stringify(). ✅ Option 2: Write your own recursive deep clone For learning purposes or environments without structuredClone(). ⚡ Pro Tip: If you’re working with complex data structures (like nested Maps, Sets, or circular references), use: structuredClone() It’s native, fast, and safe. Final Thoughts Deep cloning is one of those "simple but tricky" JavaScript topics. Knowing when and how to do it properly will save you hours of debugging in real-world projects. 🔥 If you found this helpful, 👉 Follow me for more JavaScript deep dives - made simple for developers. Let’s grow together 🚀 #JavaScript #WebDevelopment #FrontendDevelopment #CodingTips #LearnJavaScript #Programming #DeveloperCommunity #AkshayPai  #WebDev #ES6 #JSDeveloper #JavaScriptTips #JavaScriptObjects #JavaScriptClone #JavaScriptCloneObject

🚀 New Blog Alert! Ever changed a nested value in JavaScript and wondered why your original object also changed? 😅 That’s the hidden magic (and pain) behind shallow vs deep copy in JavaScript. In my latest Medium article, I’ve broken down: 🧠 How JavaScript handles memory (stack vs heap) 🔍 Why shallow copies share references ⚙️ How deep copy truly works under the hood 💡 Real-world examples using structuredClone(), Object.assign(), and lodash.cloneDeep() 👉 Read here: https://lnkd.in/d9VdByK6 #JavaScript #WebDevelopment #Coding #DeepCopy #ShallowCopy #Frontend #MERN #ShubhamDeveloper

Is AI writing your React code yet? We're beyond asking if AI can code; we're now optimizing how it helps us build. As a JavaScript/React developer, the real game-changer isn't just large language models—it's how tools like GitHub Copilot are deeply integrating into our workflow. They're auto-generating complex React Hooks, suggesting full component structures, and catching edge cases before they become bugs. This isn't replacement. It's an unprecedented boost in Developer Velocity. Are you leveraging these tools to move faster, or are you still coding solo? #AIinTech #ReactJS #JavaScript #DeveloperProductivity

3 Ways to Access Object Properties in JavaScript When working with objects in JavaScript, you’ll often need to read or update property values. Here are the three essential ways to access them: 1️⃣ Dot Notation – obj.name The most common and readable method. Use it when the property name is a simple, valid identifier. Example: obj.name 2️⃣ Bracket Notation – obj['age'] Helpful when property names contain spaces, special characters, or start with numbers. Also required when the key is dynamic. Example: obj['age'] 3️⃣ Variable (Dynamic) Access – obj[prop] Used when the property name is stored in a variable. Perfect for loops, functions, or dynamic operations. Example: let prop = "name"; obj[prop]; 🚀 Mastering these three access methods is fundamental to understanding how objects work in JavaScript. Let me know if you want a deeper explanation or examples! #Js #AI #Java #php #out #tech #world #dev

JavaScript Prototypes: The Moment Everything Finally Made Sense 🚀 I spent years writing JavaScript without understanding what was really happening under the hood. 🤔 Then one day, I noticed something that didn't make sense: Why can I call methods on primitive strings when they're not even objects? How does dot notation work on a simple text value? This simple question sent me down a rabbit hole that completely changed how I think about JavaScript. 🤨 Here's what I discovered: ✨ Every object has a hidden __proto__ property that creates inheritance chains ✨ JavaScript temporarily "wraps" primitives to give them object-like behavior ✨ The prototype system is what makes inheritance actually work ✨ Classes are just syntactic sugar over prototypes ✨ Understanding this unlocks why JavaScript behaves the way it does I documented my entire journey - from confusion to clarity - in a detailed article where I: → Experimented with prototype chains → Built real-world examples (API clients, databases) → Solved the primitive methods mystery → Explained __proto__ vs prototype once and for all Whether you're a beginner trying to understand JavaScript or an experienced dev who wants to know what's happening behind the scenes, this deep dive breaks it down step by step. 🔗 Read the full article: https://lnkd.in/g26HR8x7 Have you ever wondered about JavaScript's prototype system? Drop a comment with your biggest "aha!" moment when learning JS internals! 👇 #JavaScript #WebDevelopment #Programming #SoftwareEngineering #WebDev #FrontendDevelopment #LearnToCode #CodeNewbie #TechBlog

🚀 Taming Legacy Technical Debt: From Python Foundation to JavaScript Solution Legacy JavaScript codebases suffer from a hidden problem: functions that lie about what they do. 💥 The Silent Killer in JavaScript Projects These semantic bugs are technical debt that traditional tools miss. They analyze syntax, not meaning. 🔧 The JavaScript Code Harmonizer Solution Building on the proven LJPW semantic framework from the Python Code Harmonizer, the JavaScript version is engineered specifically for JavaScript's unique challenges: 🎯 Legacy Debt Detection - Finds functions where intent contradicts execution - Identifies architectural smells in large codebases - Prioritizes technical debt by impact and confidence ⚡ Production-Ready - 100% test coverage (93/93 tests passing) - 3.7x speedup with intelligent caching - Parallel processing for large legacy projects - CI/CD integration with quality gates 💻 Developer-Friendly 🏗️ From Python Foundation to JavaScript Solution The Python Code Harmonizer established the mathematical foundation for semantic analysis. The JavaScript version extends this to address JavaScript-specific challenges: - JavaScript/TypeScript ecosystems with Babel AST parsing - Frontend-heavy architectures with component analysis - Rapid development cycles with pragmatic, plain-English output - Enterprise integration with SARIF and GitHub Actions 📊 Real Impact on Development Teams Teams are using these tools to: - Uncover semantic bugs hidden in legacy code - Prioritize refactoring efforts with confidence scores - Establish quality gates for CI/CD pipelines - Train developers on semantic best practices 🚀 Explore the Tool: JavaScript Code Harmonizer: https://lnkd.in/dfD7Vhei --- Legacy technical debt doesn't have to be a mystery. When you understand what your code *means* (not just what it says), you can finally tame those codebase monsters and help developers build better software. Feedback welcome! #JavaScript #TypeScript #LegacyCode #TechnicalDebt #CodeQuality #SoftwareEngineering #DeveloperTools #OpenSource #WebDevelopment #Frontend #Backend #DevTools