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Rajat Jain

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Software Engineer at Uber, ex-Microsoft. I write about Software Development Concepts and try it to create the right mental model for a concept in the minds of readers.

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Design an LRU cache

Mar 17, 20224 min read

What is an LRU Cache Let’s first quickly go over what is cache. Computers have cache memory that temporarily stores the most frequently used data. It’s a great way to get the data that is used most often because the retrieval process is super fast. H...

Design an LRU cache

Trim a binary search tree

Jan 28, 20222 min read

Well, well, well I know what you all are thinking. A tree problem?? When are we ever gonna use it? Why do interviewers ask questions related to Trees? My thoughts It is not about a Tree question. It is about checking your logic, how confident are you...

Trim a binary search tree

useState hook - behind the hood

Dec 18, 20214 min read

Introduction 🍾 Hooks are special functions which let you "hook into" different React features. State, being one of its features, is hooked into by using the useState React hook. When you call useState, you are telling React that you want this compon...

useState hook - behind the hood

Easy Implementation of Promise in JS

Sep 10, 20216 min read

Disclaimer: In this post, I am not going to implement Promise exactly the way it has been done in the JS specification. This is more likely a frontend interview question and focusses more on the functional aspect of Promise. You can find the complete...

Easy Implementation of Promise in JS

4 must know cool features in Javascript

Aug 31, 20215 min read

We as frontend developers try to optimise the way our webpages work. Javascript, with its cool new features help us optimise the way we write code in a cleaner, better and less clumsier way. Following are the four cool features in JS, which every Jav...

4 must know cool features in Javascript

Put most of your logic in reducers

Aug 30, 20214 min read

Redux - Best Practices

Put most of your logic in reducers