Oana Rinaldi – Page 12 – Art of Coding

Java Stream API: Grouping Employees by Department Example

Java Stream API: Grouping Employees by Department Example One of the most powerful features introduced in Java 8 was the Stream API. It brought a functional programming flavor to…

Oana Rinaldi December 14, 2025

Shell / Bash

@CronMaster3000: Schedule Daily Reports via Bash + crontab + SQL

@CronMaster3000: Schedule Daily Reports via Bash + crontab + SQL In a world overflowing with data, automating daily reporting is no longer just nice-to-have—it's a must. Thankfully, with a…

Oana Rinaldi December 13, 2025

SQL

SQL Window Functions for Time-Based Event Tracking

SQL Window Functions for Time-Based Event Tracking Tracking user behavior or system events over time is a core requirement in analytics, monitoring, and debugging. Fortunately, SQL window functions are…

Oana Rinaldi December 12, 2025

Shell / Bash

Regex-Powered Log Parser in Bash: Extract Meaningful Metrics from Server Logs

Regex-Powered Log Parser in Bash: Extract Meaningful Metrics from Server Logs Log files aren’t just mountains of text — they’re full of insights waiting to be discovered. Whether you’re…

Oana Rinaldi December 11, 2025

Java

Real-Time Currency Converter with Java + OpenExchangeRates API

Real-Time Currency Converter with Java + OpenExchangeRates API Building a real-time currency converter is a practical Java project that illustrates how to consume third-party APIs, parse JSON data, and…

Oana Rinaldi December 8, 2025

Python

Python Script to Automatically Rename Bulk Images Using EXIF Data

Python Script to Automatically Rename Bulk Images Using EXIF Data Managing large sets of images can quickly become chaotic, especially when filenames like IMG_3412.JPG or DSC00095.JPG offer no useful…

Oana Rinaldi December 7, 2025

Java

Secure Password Validation in Java Using Regular Expressions

Secure Password Validation in Java Using Regular Expressions Creating secure password validation logic in modern applications is a critical step toward protecting user data. Weak passwords open doors to…

Oana Rinaldi December 6, 2025

Python

Automate Email Reports with Python and Gmail API

Automate Email Reports with Python and Gmail API Automating routine tasks like sending daily or weekly email reports can help reduce manual work and improve efficiency for developers and…

Oana Rinaldi December 5, 2025

JavaScript

Interactive Form Validation With Vanilla JavaScript Only

Interactive Form Validation With Vanilla JavaScript Only Form validation is one of the most important aspects of client-side development. While modern libraries like React or Vue offer form validation…

Oana Rinaldi December 4, 2025

JavaScript

Using JavaScript to Scrape Table Data from Any Web Page

Using JavaScript to Scrape Table Data from Any Web Page Web scraping is a powerful way to retrieve data without relying on APIs. Whether you're analyzing public data or…

Oana Rinaldi December 3, 2025