Bijay Kumar 
I’ve often seen applications crawl to a halt because of unnecessary rerenders. It is a common frustration when a small change in a parent component triggers a full refresh of every single child, even when their data hasn’t changed. I remember working on a high-traffic financial dashboard for a New York firm where every tick … Read more >>
Throughout my years of building large-scale React applications, I’ve found that how you organize and export your components is just as important as the logic inside them. In this guide, I will show you the different ways to export components in React, using real-world examples that go beyond simple “Hello World” snippets. Whether you are … Read more >>
In my years of developing React applications, testing has always been the backbone of a reliable product. One tool I find myself reaching for constantly is jest.spyOn(). It is incredibly useful when you want to track how a component interacts with its dependencies without completely replacing them. In this tutorial, I’ll share how I use … Read more >>
I have run into many situations where I needed to duplicate data without affecting the original. It sounds simple enough to just use the assignment operator, but that is often where the trouble starts for many developers. I remember working on a logistics dashboard for a shipping company in New York, and we had a … Read more >>
I’ve often run into scenarios where a class inherits from multiple parents. It can get confusing quickly when those parent classes have methods with the same name. Python uses a specific set of rules called Method Resolution Order (MRO) to decide which method to run first. Understanding MRO is essential if you want to master … Read more >>
Managing memory in Python used to feel like a “black box” to me when I first started developing large-scale applications for US-based fintech firms. I often wondered how my scripts could handle millions of transaction records without crashing the system or slowing down the server. Understanding how Python stores objects in memory changed the way … Read more >>
During my years developing complex Python applications, I have often found myself needing to peek under the hood of an object. Whether I am debugging a Django model or inspecting a data frame, knowing exactly what attributes are available is a lifesaver. Python provides two built-in functions for this: dir() and vars(). While they might … Read more >>
In my years of building large-scale Python applications, I have often needed to peek under the hood of how objects store their data. One of the most powerful yet misunderstood tools for this is the __dict__ attribute. Whenever I am debugging complex class hierarchies or building dynamic APIs, __dict__ is my go-to for inspecting object … Read more >>
Checking the type of an object or verifying class inheritance is something I do daily when building complex Python applications. Whether I am validating data from a web form or ensuring a function receives the correct object type, these built-in functions are my go-to tools. In this tutorial, I will show you exactly how isinstance() … Read more >>
Building a multi-step interface can often feel like a daunting task when you first start out with React. I remember the first time I had to build a complex checkout flow for a logistics client based in Texas; I spent hours trying to manage the state between different screens. In this tutorial, I will show … Read more >>
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