Category: Software

The WAL(Redo log) is essential to normal database operations. In some sense “The LOG is the DATABASE” has some truth to it. The WAL stores a log of all activities performed in the database. In other words, it maintains the state of the database system. Having the WAL is useful in many ways and one…

Streamlit apps sleep after a period of inactivity if hosted on Streamlit Community Cloud (free tier) To wake your app up, you need to click a button We can use Github actions + Selenium to automate this button clicking every couple of hours Streamlit apps hosted on the Community Edition (free tier) go to sleep…

Todos hemos estado ahí. Le pides a una IA que genere un código y te devuelve un desastre: usa librerías obsoletas, ignora por completo el contexto de tu app o, peor aún, “alucina” una solución que parece plausible pero es fundamentalmente incorrecta. El problema no es la IA. El problema es que la tratamos como…

There’s a common sentiment in our web and mobile development world: “Do I really need Data Structures and Algorithms (DSA)? Isn’t that just for MAANG interviews?” My experience says yes. I want to share a story from one of my projects where a fundamental understanding of DSA saved my day in production. The Problem: Optimising…

When deploying a Virtual Private Server (VPS) for production use, security should be your top priority. A freshly provisioned server comes with default configurations that prioritize accessibility over security—fine for development, but dangerous in production environments. This guide walks you through essential hardening steps that transform your VPS from vulnerable to production-ready. Before everything else…

Introduction As part of my continuous exploration of application security, I worked on a practical project to comprehend the practical dangers of sending data without encryption. Even though theoretical knowledge is important, nothing helps to cement comprehension like extracting real-time credentials from network data. With the “HTTP Credential Sniffer & Secure Transmission Analyzer,” I delved…

Banyak developer atau sysadmin yang butuh setup server sederhana untuk aplikasi berbasis container. Artikel ini membahas cara membuat VPS berbasis RedHat (contoh: Amazon Linux, CentOS, Rocky, AlmaLinux) siap pakai di mode produksi menggunakan Docker, Nginx, dan Cloudflare SSL. 1. Update Sistem & Persiapan User Update paket sudo dnf update -y Enter fullscreen mode Exit fullscreen…

Every developer remembers their early days — messy projects, endless debugging, and that magical feeling when things finally work. Looking back, I realize that my first 10,000 lines of code were filled with mistakes, shortcuts, and “aha” moments. If I could travel back in time, these are the lessons I would tell my beginner self…

In the last post, we coded up the infinite scrolling horizon upon which the Dino runs and in the process we learned how to display images on the canvas, how coordinates work in pygame, how to use the pygame.time.Clock class in controlling the Refresh rate of the video game among a few other lessons. In…

TL;DR Debugging Solidity smart contracts is crucial due to their immutable nature. Hardhat offers a console.log function, similar to JavaScript’s, allowing developers to print variables and messages directly from Solidity code. To use it, import hardhat/console.sol into your contract. While console.log is invaluable during development, it’s recommended to remove such statements in production to optimize…