@soumyaditya

Map and Set in JavaScript

18h ago · 4 min read · Introduction JavaScript’s default tools—Objects and Arrays—work well, but they start to break down in specific scenarios like key collisions and duplicate handling. Map and Set are designed to solve e

How Node.js Handles Thousands of Requests with Just One Thread

19h ago · 5 min read · If you come from languages like Java or Python, this idea sounds wrong at first. The idea that a single thread can handle many users at the same time feels counterintuitive, almost like it should fail

URL Parameters vs Query Strings in Express.js

21h ago · 4 min read · When building real applications, URLs are not just addresses. They carry meaning and data. Two of the most common ways to pass data in a URL are URL parameters and query strings. At first glance, they

Storing Uploaded Files and Serving Them in Express

1d ago · 7 min read · When people build web apps, file uploads show up very quickly. A user may upload a profile photo, a resume, a product image, or a PDF. That file needs to go somewhere, and later it often needs to be s

Sessions vs JWT vs Cookies

3d ago · 4 min read · Authentication is something every developer uses, but not everyone fully understands. You log in, it works, and you move on. But behind the scenes, three core concepts are doing the work: sessions, co