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NRNavdeep Rohillajavascript-journey-by-navdeep.hashnode.devMay 10 · 4 min read

Callbacks in JavaScript: Why they exist

Hello guys, in this article we are going to learn about the callback functions in the js, what are they , why we use them and the problems we face while using them. Callback function A callback functi

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BKBabita Kumaricallbacks-why-exist.hashnode.devMar 26 · 4 min read

Callbacks in JavaScript: Why They Exist

Introduction JavaScript is a powerful language where functions are treated as values. This means: You can assign functions to variables Pass functions as arguments Return functions from other funct

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DSDiwya sudarshan kaushikdskwebdev.hashnode.devMar 23 · 3 min read

Callbacks in JavaScript: Why They Exist

1. The Foundation: Functions are First-Class Citizens Before diving into callbacks, you must understand that in JavaScript, functions are values. Just like you can pass a string or a number into a fun

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SMSubhadip Mishrasubhadipmishra1901.hashnode.devMar 14 · 6 min read

🚀 Beyond the Surface: Understanding the Node.js Event Loop

Most developers use Node.js every day because it is fast and non-blocking.But if someone asks: How does Node.js handle thousands of connections with a single thread? Many developers struggle to expl

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SShashaankarsystemsnsentience.hashnode.devFeb 25 · 6 min read

Concepts around Concurrency and Parallel Programming

Concurrency vs Parallelism Many engineers use these words interchangeably. They are not the same. Concurrency Concurrency is the ability to run multiple tasks at the same time i.e., load multiple task

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JVJason Vertreesjvertrees.hashnode.devJan 16 · 4 min read

Part 3: Tracing and Chaos

In the last two posts, we verified that our system can handle paused services (Part 1) and dead message brokers (Part 2). But resilience isn't just about surviving; it's about understanding what is happening when things go wrong. The Architecture Rec...

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PSpankaj singh0xpankaj.hashnode.devDec 26, 2025 · 6 min read

Demystifying Rust's Async: A Comprehensive Guide to Futures, Executors, Reactors, and Beyond

Rust's asynchronous programming model is one of its most powerful features, enabling efficient, non-blocking I/O and concurrent operations without the overhead of threads. However, it can be confusing for newcomers—especially concepts like futures, a...

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ASArjun Saxenaarjun-dev.hashnode.devDec 13, 2025 · 4 min read

The Node.js Event Loop Explained

“Node.js is single-threaded… then how does it handle so many users?” The short answer is 👉 The Event Loop In this article, we’ll understand: What the Node.js Event Loop is Blocking vs Non-blocking code How Node.js handles multiple requests with a...

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MJMorteza Jangjoojangjoo.hashnode.devSep 2, 2025 · 3 min read

Task.WhenAll

As .NET developers, we often deal with scenarios where multiple asynchronous operations need to run — fetching data from APIs, reading files, calling services, or performing database queries. A common question arises: Should we await tasks one by one...

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JCJessica Chantechieidea.hashnode.devAug 13, 2025 · 4 min read

Speed Up Your Node.js App: Performance Checklist

A speedy app isn’t just a nice-to-have but it’s essential for survival. In the fast-paced digital world we live in users will leave quicker than your server can catch up if things start to slow down. But here’s the silver lining, with a few smart adj...

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#asyncprogramming

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Trending tags this week

Callbacks in JavaScript: Why they exist

Callbacks in JavaScript: Why They Exist

Callbacks in JavaScript: Why They Exist

🚀 Beyond the Surface: Understanding the Node.js Event Loop

Concepts around Concurrency and Parallel Programming

Part 3: Tracing and Chaos

Demystifying Rust's Async: A Comprehensive Guide to Futures, Executors, Reactors, and Beyond

The Node.js Event Loop Explained

Task.WhenAll

Speed Up Your Node.js App: Performance Checklist