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Latest Articles

DDIA Chapter 7 — Sharding (Part 1)

This guide explains how sharding distributes different subsets of data across machines and works alongside replication to improve availability. It explores the benefits of horizontal scaling and the practical costs of choosing partition keys, querying across shards, and coordinating transactions.

DDIA Chapter 6 — Replication (Part 1)

This guide covers the first half of Chapter 6 of Designing Data-Intensive Applications, explaining how replication reduces read latency and improves availability and read throughput. It explores single-leader replication, the tradeoffs between synchronous and asynchronous replication, and the challenges of adding replicas and managing storage costs.

DDIA Chapter 6 — Replication (Part 2)

This guide to the second half of Chapter 6 of Designing Data-Intensive Applications explores how multi-leader replication reduces cross-region write latency and the tradeoffs it introduces for fault tolerance and consistency. It compares all-to-all, circular, and star replication topologies, with leaderless replication covered in the follow-up available exclusively to E+ members.

Feature Articles

[Medium] LeetCode JS 30 - 2625. Flatten Deeply Nested Array

Learn how to flatten deeply nested arrays in JavaScript without using the built-in Array.flat method. This tutorial introduces a recursive approach to flattening multi-dimensional arrays to a specified depth. Enhance your JavaScript skills with this comprehensive guide!

How to remove duplicates from an array?

Learn multiple solutions to remove duplicates from an array efficiently in JavaScript. This tutorial covers four methods: using Set, filter with indexOf, nested for loop, and utilizing Object or Map. Enhance your JavaScript skills and be well-prepared for array manipulation challenges in interviews and real-world scenarios.

The Most Common JavaScript Event Loop Interview Questions

The event loop is a common question in interviews. In addition to knowing the concept, You also need to know how it works in code. Here we have listed common JavaScript event loop code interpretation questions

What is the CSS Box Model?

When the browser engine lays out the document, it will treat each element as a rectangular Box according to the Box Model of CSS. This Box is composed of content, padding, border and margin.