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Shuffle an array in place

Pinned article
Jun 29, 20213 min read

❓Question Write the function shuffle(array) that shuffles (randomly reorders) elements of the array. Multiple runs of shuffle may lead to different orders of elements. For instance: let arr = [1, 2, 3]; shuffle(arr); // arr = [3, 2, 1] shuffle(arr)...

Shuffle an array in place

Log Appropriately

Jul 14, 20213 min read

The right log message can make the difference between tracking down a problem in 2 minutes vs. spending days investigating mysterious behaviour. Unfortunately, knowing what to log and how to log it can often feel like an art. It’s certainly easy to f...

Log Appropriately

In place deduping an array

Jun 23, 20213 min read

❓Question Given an array containing all kinds of data, please implement a function deduplicate() to remove the duplicates. You should modify the array in place. Before jumping on the later sections, do give it a try yourselves. These blogs will only ...

In place deduping an array

LocalStorage wrapper with expiration

Jun 22, 20213 min read

LocalStorage is a simple and handy client-side storage, but you should avoid using it because it is synchronous and cause performance issue by blocking the main execution thread. LocalStorage has no expiration time, data in the LocalStorage persists ...

LocalStorage wrapper with expiration

Implement Promise.all

Jun 21, 20215 min read

This blog post is a part of the frontend interview series. Do check out other posts. Ignoring the cheesy subtitle of the blog 😛, let us get serious here for sometime. The interviewer won't ask you this direct question, mostly. At least if I was the...

Implement Promise.all

Understanding Events in React

Jun 20, 20215 min read

Disclaimer: React official docsite ⚛️ is itself a good resource to understand events and their handling in the React ecosystem. Then, why do I have to write about it again? Well, in this blog post, I have explained what events in React are composed...

Understanding Events in React