Nam Vo Website
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LATEST BLOG
PWA and Service Worker: Making Your Web App Feel Native
You might have seen browsers allow you to install a website like an app. Building a native application takes significant effort, and not many common applications support it. Google Calendar and Gemini are examples. To use them like a native app, I ju...
2026-04-25 17:28:32 +0700
· 3 mins read
Software Engineer
Software Engineer
Frontend
Frontend
CORS and CSRF: How Attackers Exploit the Gaps
I used to think CORS was a security feature. It is, partially. But the more I understood it, the more I realized how narrow its protection actually is. This post walks through how CORS works under the hood, where it breaks down, what CSRF is, and how...
2026-04-04 18:08:15 +0700
· 5 mins read
Software Engineer
Software Engineer
Top blogs
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Interpreted vs Compiled Programming Languages
Programming languages serve as powerful tools for developers to create software applications and bring their ideas to life. Behind the scenes, these languages are executed by either compiling or interpreting processes. In this blog, we will explore t...
Software Engineer
Software Engineer
2024-07-10 17:07:38 +0700
· 4 mins read
Common Mistakes When Using Sidekiq
Sidekiq is a popular background job processing library for Ruby that allows you to offload time-consuming tasks from your main application thread. While Sidekiq can significantly improve the performance and responsiveness of your application, it's es...
Ruby on Rails
Ruby on Rails
2024-08-27 21:25:30 +0700
· 3 mins read
How to get table index size in PostgreSQL
Indexes play a crucial role in enhancing the performance of database queries. They allow for faster data retrieval by creating a separate data structure pointing to the data stored in a table. However, indexes come with a cost in terms of disk space ...
Software Engineer
Software Engineer
2024-07-10 23:01:49 +0700
· 1 min read
Solving the "must appear in the GROUP BY clause" Error in Rails and PostgreSQL
This blog will give an example of how to resolve this common error when using group_by in Active Record1. Example problemFirst, take a look at this SQL problem. Imagine you're working on a booking application where users can have multiple sessions. Y...
Software Engineer
Software Engineer
Ruby on Rails
Ruby on Rails
2024-07-10 23:00:10 +0700
· 3 mins read
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