high-order-functions.hashnode.devHigher-Order Functions in JavaScript — From First Principles to Real Use CasesHigh order functions are functions which accept a function in its argument or returns an function. Lets discuss an high order function with examples : function name(passed){ name = "Abhinab"; passed(name) } function greet(fullName){ cons...Feb 17·6 min read
curl-for-begineers.hashnode.devcURL for begineerscURL Explained Simply (For Absolute Beginners) If you’re learning backend development, APIs, or even just “how the internet works,” you’ll hear people casually say things like: “Just hit the API with cURL.” And if you’re new, that sentence feels… i...Jan 30·4 min read
dns-resoulution-working.hashnode.devDNS ResolutionUnderstanding DNS Using dig A Layered Walkthrough from Root Servers to google.com 1. What is DNS and why name resolution exists The internet fundamentally operates on IP addresses. Every server connected to the internet is identified by a numeric add...Jan 30·5 min read
dns-record-types-begineers.hashnode.devDNS Record TypesHow does a browser know where a website lives? When you type www.example.com into your browser, your computer has one big problem: Computers don’t understand names. They understand numbers. So the browser asks a question: “Hey internet. where does t...Jan 30·3 min read
tcp-working-three-way-handshaking.hashnode.devTCP working : 3 way handshakeWhy Do We Even Need Rules to Send Data? Imagine you’re sending a long message to a friend by shouting sentences across a noisy room. Some sentences get lost Some arrive out of order Some arrive twice You don’t know if the other person actually he...Jan 30·5 min read
