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Latest Articles

What is the N + 1 Query Problem? How to Avoid It Effectively?

The N + 1 query problem is a common database performance issue that occurs when an application executes one query to fetch a list, then runs additional queries for each result. This causes query count to scale linearly with data volume. Using JOIN or IN clauses can effectively prevent this problem.

How Should Senior Engineers Oversee Code Reviews?

Exploring how senior engineers can elevate code review practices at the team level, focusing on systemic quality improvements, knowledge transfer, and fostering a healthy team culture. Addresses common pitfalls like lenient reviews, emotional attacks, and unconstructive feedback.

What Is Web Worker? Where Can It Be Used?

In the early days of frontend development, there wasn't much to process on the frontend side, mostly simple event handling and animation effects. However, as frontend development has matured, developers are handling more and more tasks on the frontend, and the original JavaScript design gradually became insufficient for new demands. Various technologies have emerged to fill these gaps. Web Worker and Service Worker, commonly heard in frontend development, fall into this category.

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.