JavaScript Variables: A Library of Forgettable Books

30 Days JavaScript Challenge : Day 17 ✅ Today’s problem was about designing a Time Limited Cache. The idea was to store key-value pairs, but with a twist each key should expire after a certain time. The class needed to support: • setting values with an expiry • retrieving values only if they’re still valid • counting how many keys are currently active This felt closer to a real-world problem, especially how caching systems work with expiration. It was interesting to think about how to manage time, state, and updates together in a clean way. 17 days in learning not just syntax, but how to think through problems. 💻🚀 #javascript #leetcode #webdevelopment #frontenddeveloper #codingchallenge #learninginpublic #developers #programming #buildinpublic

I just published my first blog on Dev.to! I wrote about the current value of JavaScript in 2026 and why it’s still one of the most important skills for developers. I’m still early in my learning journey, so I’d really appreciate any feedback or suggestions 🙌 Here’s the blog: https://lnkd.in/gqQkh-3a #JavaScript #WebDevelopment #LearningInPublic #Programming

30 Days JavaScript Challenge: Day 18 ✅ Today’s problem was about implementing a debounce function. The idea is simple but very useful delay the execution of a function, and if it gets called again within that delay, cancel the previous call and restart the timer. This concept is widely used in real-world scenarios like: • search input optimization • reducing unnecessary API calls • handling rapid user events It was a great exercise to understand how timers and function control work together in JavaScript. 18 days in getting more comfortable with concepts that are actually used in real applications. 💻🚀 #javascript #leetcode #webdevelopment #frontenddeveloper #codingchallenge #learninginpublic #developers #programming #buildinpublic

30 Days JavaScript Challenge : Day 20 ✅ Today’s problem was about checking whether a given object or array is empty. At first glance, it looks very simply, but it makes you think about how data structures actually store values whether it’s checking keys in an object or elements in an array. Also tried to think about how this can be done efficiently, even aiming for O(1) time complexity. Problems like these remind me that even basic concepts can have deeper layers when you try to implement them properly. 20 days in consistency is building up, one problem at a time. 💻🚀 #javascript #leetcode #webdevelopment #frontenddeveloper #codingchallenge #learninginpublic #developers #programming #buildinpublic

30 Days JavaScript Challenge: Day 11 ✅ Today’s problem was about memoization , a concept where we store the result of a function call and reuse it when the same inputs come again. The goal was to return a memoized version of a function so that it doesn’t run multiple times for the same inputs and instead returns the cached result. It was interesting to see how this can optimize performance, especially for functions like factorial or fibonacci where repeated calculations can happen. Concepts like these show how small optimizations can make a big difference in real applications. 11 days in focusing on understanding not just how to write code, but how to write it efficiently. 💻🚀 #javascript #leetcode #webdevelopment #frontenddeveloper #codingchallenge #learninginpublic #developers #programming #buildinpublic

Today I explored one of the most fundamental concepts in programming Classes and Objects, and how they differ between C++ and JavaScript. At first, both looked similar on the surface, but as I went deeper, I realized how different their core concepts actually are. In C++, everything revolves around strict class-based structure with strong typing and clear rules. It feels powerful and controlled. On the other hand, JavaScript is much more flexible. What surprised me the most is that JavaScript is actually prototype-based, and classes are just syntactic sugar over prototypes. This completely changed the way I look at JS. I also learned: How objects are created and used in both languages The difference in syntax and behavior Why JavaScript is more dynamic compared to C++ How concepts like inheritance and encapsulation work differently #javascript #cpp #programming #webdevelopment #learning #developers #codingjourney

What is ? 🤔 Just a question mark… right? Nope 😏 In JavaScript, this tiny symbol can save your production from crashing 💥 👉 ?. → optional chaining user.profile?.name No crash… just undefined 😌 👉 ?? → nullish coalescing age ?? 18 Only replaces null or undefined Not 0 or false 🔥 👉 ? : → ternary operator isLoggedIn ? "Welcome" : "Login" Short and clean condition 🔥 Rule: ?. → safe access ?? → correct default ? : → quick condition 💬 Question: Which one do you use the most in real projects? 😄 #javascript  #codingtips #programming #developer #100daysofcode

🚀 JavaScript Fundamentals Series — Part 3 Programs are not just instructions. They are decisions. This is where control flow comes in. In this guide I explain: • if / else conditions • switch statements • for loops • while loops • Writing readable logic Once you understand control flow, you can finally start writing real programs instead of simple scripts. Full guide 👇 https://lnkd.in/d8wkkNbF #javascript #programming #webdev

30 Days JavaScript Challenge: Day 25 ✅ Today’s problem was about merging two arrays of objects based on a common key (id). Sounds simple at first, but it had a few interesting parts: Handling unique ids Merging objects when ids match Making sure values from the second array override the first Keeping everything sorted It’s actually very close to real-world scenarios like combining data from two APIs or updating existing records with new data. Problems like this make you think more about data handling and structure, not just loops and conditions. Day by day, things are starting to connect better. 🚀 #javascript #leetcode #webdevelopment #frontenddeveloper #codingchallenge #learninginpublic #developers #programming #buildinpublic #JavaScriptMastery

Revisiting a simple but powerful JavaScript concept today: map() map() allows us to transform each element of an array and return a new array. Example: doubling numbers in an array. Small concepts like these form the foundation of writing cleaner and more functional JavaScript code. #JavaScript #WebDevelopment #FrontendDevelopment #Programming #CodingJourney #LearningInPublic