How to Reverse an Array in JavaScript without Using Reverse()

📒Today I explored an interesting JavaScript concept: Floating -Point Precision Errors. If you've ever tried:  0.1+0.2 === 0.3 // false It can feel confusing at first. But this happens because JS uses binary floating-point numbers, which cannot represent certain decimal values precisely. But solution is here: To handle these tiny precision issues, JS provides:- Number.EPSILON The value of Number.EPSILON is the difference between 1 and the smallest value greater than 1 that is representable as a Number value, which is approximately: 2.2204460492503130808472633361816 x 10−16. Developers often use it to compare decimal values safely. Learning about this helped me understand why precision matters in JavaScript and how to write more reliable code. To make it more understandable, I also made a tinny project called 'Floating point checker'. Code snippet is below here. Step by step, I am getting more confident with JS fundamentals. #JavaScript #WebDevelopment #StayLearning

🚀 Day 812 of #900DaysOfCode 🧠 Understanding the `this` Keyword in JavaScript One of the most confusing yet powerful concepts in JavaScript — the `this` keyword — is something every developer must deeply understand. In today’s post, I’ve covered: ✅ What `this` actually refers to in different contexts ✅ How it behaves inside functions, objects, and classes ✅ Common mistakes developers make ✅ Practical examples to master its behavior If you’ve ever found `this` acting unexpectedly in your code, this post will clear it all up once and for all. 💬 What’s the most confusing part of `this` for you? Share your thoughts in the comments 👇 #Day812 #900DaysOfCode #JavaScript #FrontendDevelopment #WebDevelopment #CleanCode #CodingCommunity #JSBasics #ProgrammingTips

❓ Are “undefined” and “not defined” the same in JavaScript? Not really. In JavaScript, every declared variable automatically gets the placeholder undefined during the memory allocation phase — meaning the variable exists, but no value has been assigned yet. However, if you try to access a variable that was never declared, JavaScript throws not defined. ➡️ Undefined = declared but not assigned ➡️ Not Defined = not declared at all JavaScript is also a loosely typed language, so variables can change types freely. 💡 Pro tip: Never manually assign undefined. Let JavaScript handle that. #JavaScript #WebDevelopment #Programming #Frontend #LearningJS

Accidentally Discovered Something Cool in JavaScript! 😎 While working on some JavaScript code, I accidentally came across the ! and !! operators - and it turned out to be a really interesting find 😄 At first, I was confused 🤔 but after a bit of testing, it all made sense! - The ! (NOT) operator converts true -> false, and vice versa. - The !! (Double NOT) operator converts any value into its boolean equivalent value and its great for checking if something is truthy or falsy. This tiny trick makes conditions cleaner and helps when validating inputs or checking existence of values in JavaScript. Tiny discoveries like these remind me how fun it is to explore and learn JavaScript every day! 😊 . . . . . . . #WebDevelopment #JavaScript #Frontend #CodingJourney #LearningByDoing #Developer #Coding #LearningToCode #FrontendDevelopment #DevelopersCommunity #CodingTips #CodeWithMe #CleanCode #CodeBetter #DevLife

JavaScript Expressions vs Statements — Know the Difference! When learning JavaScript, many beginners confuse expressions and statements — but understanding them makes your code more readable and logical. --- 🧩 What is an Expression? An expression is any valid unit of code that produces a value. It can be a variable, a function call, or even a calculation. Example: 5 + 10 // Expression x * y // Expression greet("Kishore") // Function call expression ✅ Output: Expressions always return a value. --- 🧱 What is a Statement? A statement performs an action — like declaring a variable, using a loop, or an if condition. It tells the program what to do. Example: let total = 5 + 10; // Statement if (total > 10) { // Statement console.log("Big number!"); } 🧠 Statements control the flow, while expressions produce values. --- 🔁 In short: Type Purpose Example Expression Produces a value x + y Statement Performs an action if(x > y) { ... } --- 🔖 #JavaScript #WebDevelopment #Frontend #JSConcepts #CodingTips #WebDevCommunity #LearnToCode #100DaysOfCode #DeveloperJourney #ExpressionsVsStatements #CodeLearning #KishoreLearnsJS

Why your async function isn’t returning what you expect Every JavaScript developer has faced this at least once: You write an async function, return a value, and still get undefined when you log it. Here’s why. When a function is marked as async, it automatically returns a Promise, not the actual value. Example: Check Slide 1 So when you log it, you’re logging the promise, not the resolved value. To access the result, you need to await it or use .then(): Check slide 2 Or await Check slide 3 In short: If your async function isn’t “returning” what you expect, it’s probably because you’re treating an asynchronous operation like a synchronous one. JavaScript won’t wait unless you tell it to. #softwaredevelopment #webdevelopment #programming #javascript #fypシ

💻 JavaScript Array Methods – Quick Notes 📘 Here’s a quick list of important JS array methods I revised today 👇 Part 1: toString(), join(), pop(), push(), shift(), unshift(), delete, concat(), sort(), splice(), slice(), reverse(), isArray(), indexOf() Part 2: lastIndexOf(), find(), findIndex(), includes() Part 3: entries(), every() Part 4: some(), fill(), copyWithin(), valueOf(), forEach(), map(), filter(), reduce(), reduceRight() Simple, powerful, and essential for every JavaScript learner! 🚀 #JavaScript #WebDevelopment #Coding #Learning

💡 Understanding Object Methods in JavaScript Working with objects is fundamental in JS. Here's a quick overview of some powerful methods: Object.keys(obj) → Returns all keys of the object. Object.values(obj) → Returns all values of the object. Object.entries(obj) → Returns key-value pairs as arrays. obj.hasOwnProperty("property") → Checks if the object has a specific property. Object.assign({}, obj, { newProperty: "newValue" }) → Creates a new object by merging existing ones. 👉 View the full example on GitHub: https://lnkd.in/dDN-vDkD #JavaScript #FullStack #100xDevs #WebDevelopment #Coding #JSConcepts #LearnJavaScript

⚡ 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭 𝐇𝐨𝐢𝐬𝐭𝐢𝐧𝐠 𝐚𝐧𝐝 𝐒𝐜𝐨𝐩𝐞 𝐌𝐚𝐝𝐞 𝐒𝐢𝐦𝐩𝐥𝐞 ⚡ In JavaScript, two important concepts — 𝐡𝐨𝐢𝐬𝐭𝐢𝐧𝐠 and 𝐬𝐜𝐨𝐩𝐞 — control how your code runs. 𝐇𝐨𝐢𝐬𝐭𝐢𝐧𝐠 means JavaScript moves all variable and function declarations to the top before the code runs. That’s why you can sometimes use a function before it’s written. But remember — only declarations are hoisted, not values! Variables declared with var become undefined, while let and const are not accessible before declaration. 𝐒𝐜𝐨𝐩𝐞 decides where your variables can be used. 🌍 𝐆𝐥𝐨𝐛𝐚𝐥 Scope – You can use the variable anywhere in the program. ⚙️ 𝐅𝐮𝐧𝐜𝐭𝐢𝐨𝐧 Scope – The variable works only inside that function. 📦 𝐁𝐥𝐨𝐜𝐤 Scope – Works only inside { }, when declared with let or const. Understanding hoisting and scope helps you know how JavaScript actually reads and runs your code — and that’s the key to avoiding errors and writing better programs. #javascript #js #Hoisting #Scope #softwaredeveloper #JavaScriptTips #JSTutorial #webdevelopment #frontenddevelopment #CodingTips #JavaScriptDeveloper #ES6 #Programming #Coding #JSLearning #JSTypes #education #LearnJavaScript #technology #w3schools #careers

Today, I explored an important JavaScript concept Hoisting. Hoisting means JavaScript moves declarations (not initializations) to the top of their scope before code execution.