Art of Coding – Art of Coding

SQL Tricks for Real-World Data Cleaning

SQL Tricks for Real-World Data Cleaning IntroductionIn the real world, data is rarely clean. Duplicate records, inconsistent formats, and missing values often plague raw datasets and threaten the reliability…

Oana Rinaldi April 13, 2026

Shell / Bash

Practical Bash Logging: Capturing Script Output Like a Pro

Practical Bash Logging: Capturing Script Output Like a Pro IntroductionLogging is an often-overlooked but essential part of building robust Bash automation scripts. Whether you’re managing servers, automating deployments, or…

Oana Rinaldi April 9, 2026

Java

Handling Concurrency in Java: Thread Pools Made Simple

Handling Concurrency in Java: Thread Pools Made Simple IntroductionManaging concurrency is one of the key challenges in building performant, scalable Java applications. Creating too many threads can exhaust system…

Oana Rinaldi April 8, 2026

Java

REST APIs Made Simple: Build a Mini API in Java

REST APIs Made Simple: Build a Mini API in Java IntroductionREST APIs have become the backbone of modern web applications, enabling communication between systems in a standardized, stateless way.…

Oana Rinaldi April 7, 2026

JavaScript

Visualizing Algorithm Efficiency with JavaScript Timers

Visualizing Algorithm Efficiency with JavaScript Timers IntroductionUnderstanding algorithmic efficiency is crucial for every developer looking to write performance-driven code. While Big O notation offers a theoretical framework, nothing compares…

Oana Rinaldi April 6, 2026

Shell / Bash

Command-Line Calculator: Build It in Bash Without External Tools

Command-Line Calculator: Build It in Bash Without External Tools IntroductionBuilding a simple command-line calculator in Bash is a great way to explore shell scripting fundamentals. The challenge? Doing it…

Oana Rinaldi March 27, 2026

JavaScript

Build a Simple REST API Client in Node.js Without Frameworks

Build a Simple REST API Client in Node.js Without Frameworks IntroductionBuilding a lightweight REST API client in Node.js can be surprisingly simple without relying on heavy frameworks or third-party…

Oana Rinaldi March 26, 2026

JavaScript

Asynchronous File Uploads with JavaScript Fetch and Async/Await

Asynchronous File Uploads with JavaScript Fetch and Async/Await IntroductionUploading files without blocking the user interface is an essential part of modern web applications. With the power of JavaScript’s fetch…

Oana Rinaldi March 25, 2026

Shell / Bash

Monitor System Resources Automatically Using Bash + Cron

Monitor System Resources Automatically Using Bash + Cron IntroductionSystem performance monitoring is a fundamental maintenance routine every developer, sysadmin, or DevOps engineer should automate. Whether you're tracking CPU spikes,…

Oana Rinaldi March 24, 2026

SQL

SQL Query Optimization 101: Speed Up Your SELECTs

SQL Query Optimization 101: Speed Up Your SELECTs IntroductionEvery developer has faced it: a SQL query that takes forever to return results. Whether you’re dealing with large datasets, complex…

Oana Rinaldi March 23, 2026