1️⃣ Basics Q1: What are var, let, and const? var → function-scoped, hoisted, can re-declare. let → block-scoped, hoisted (temporal dead zone), no re-declare. const → block-scoped, must be initialized, no reassignment. Q2: Difference between == a...
In the fast-moving world of C# and .NET development, asynchronous programming isn’t just a “nice-to-have” skill—it’s essential. If you’ve ever run into an app that locks up, becomes sluggish, or falls apart under load, chances are you’ve already met ...
In SwiftUI, both .task() and .onAppear() are used to trigger actions when a view appears, but they serve different purposes and have important differences in behavior and use cases. ✅ .onAppear() Standard View Modifier Let’s start with .onAppear whic...
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Have you ever written an async function inside initState() to fetch data or show a loading indicator only to find your UI doesn’t update or crashes with a cryptic error? You’re not alone. Almost every Flutter dev has been there. The real issue?You’re...
Developers love how Node.js powers scalable servers with non-blocking I/O while JavaScript itself runs on a single thread. Yet most guides breeze past the heart of this magic: the event loop and its off-loading engines. Have you ever paused to ask ho...
Introduction Node.js runs on a single thread to execute JavaScript code but still handles thousands of concurrent I/O operations without blocking. How can a single-threaded runtime perform so much work at once? The secret is its event loop and asynch...
Introduction: Today's digital world runs on RESTful API integrations and all programming languages have some library or framework to help us developers create the same. Python similarly relies on frameworks such as Flask, Django, and FastAPI, etc for...
JavaScript is an asynchronous programming language, which means it can handle multiple operations at the same time without blocking the main thread. When working with asynchronous operations like API calls, file reading, or database queries, you have...
JavaScript thrives on events and asynchronous tasks. Amid its many features, callbacks quietly shape how we write non-blocking code. Yet, many overlook how crucial they are for flow control and error handling in async operations. Have you ever wonder...
