Art of Coding – Art of Coding

Speed Up SQL Queries with Window Functions

Speed Up SQL Queries with Window Functions Introduction: SQL window functions are one of the most powerful yet underused features for data analysis and reporting. They allow you to…

Oana Rinaldi March 4, 2026

JavaScript

Secure API Calls with JavaScript Fetch and Tokens

Secure API Calls with JavaScript Fetch and Tokens IntroductionWhen building modern web applications, authentication plays a critical role in protecting data and verifying identities. A popular and secure way…

Oana Rinaldi March 3, 2026

Python

Building a RESTful API Client in Python with Requests

Building a RESTful API Client in Python with Requests IntroductionAPIs are the backbone of modern software communication, enabling programs to exchange data seamlessly. In Python, the requests library has…

Oana Rinaldi March 2, 2026

SQL

SQL Window Functions Explained Through Ranking Examples

SQL Window Functions Explained Through Ranking Examples IntroductionSQL Window Functions are an essential feature for modern data analysis and reporting. When you're dealing with ordered data—like leaderboards, sales reports,…

Oana Rinaldi March 1, 2026

Databases

Optimize SQL Queries for Real-Time Dashboards

Optimize SQL Queries for Real-Time Dashboards Overview: Real-time dashboards rely on fast, efficient database queries to present up-to-the-second updates. Unfortunately, poorly optimized SQL queries can rapidly degrade performance, leading…

Oana Rinaldi February 28, 2026

Shell / Bash

Scheduling Automated Backups Using Cron and Bash Scripts

Scheduling Automated Backups Using Cron and Bash Scripts IntroductionManaging regular backups is critical for maintaining data security and business continuity. Instead of remembering to back up manually, you can…

Oana Rinaldi February 27, 2026

DevOps / CLI Tools

Build a Command-Line Tool in Python That Organizes Your Downloads Folder

Build a Command-Line Tool in Python That Organizes Your Downloads Folder IntroductionYour Downloads folder is often a dumping ground for PDFs, ZIPs, images, and all sorts of random files.…

Oana Rinaldi February 26, 2026

Automation Scripts

Automate Your File Cleanup with a Python Script

Automate Your File Cleanup with a Python Script Introduction:Maintaining clean file directories is crucial for developers, IT admins, and anyone managing large volumes of data. Over time, logs, temporary…

Oana Rinaldi February 25, 2026

Sorting Algorithms

Implementing a Custom Sorting Algorithm in Python

Implementing a Custom Sorting Algorithm in Python IntroductionSorting is one of the most common tasks in programming, forming the backbone of many data processing and optimization routines. While Python’s…

Oana Rinaldi February 24, 2026

Java

Java Streams Demystified: Process Nested Collections Like a Pro

Java Streams Demystified: Process Nested Collections Like a Pro Working with nested collections in Java can be daunting—especially when you need to extract, transform, or aggregate data efficiently. Thankfully,…

Oana Rinaldi February 17, 2026