August 2025 – Page 4 – Art of Coding

Algorithm Deep Dive: Sliding Window in JavaScript for Subarray Sums

Algorithm Deep Dive: Sliding Window in JavaScript for Subarray Sums When working with arrays and number sequences in JavaScript, you often encounter problems that require analyzing or summing up…

Oana Rinaldi August 1, 2025

Databases

Diagnose Database Performance Issues with SQL EXPLAIN Plans

Diagnose Database Performance Issues with SQL EXPLAIN Plans When it comes to tracking down sluggish SQL queries, PostgreSQL’s EXPLAIN command is one of the most powerful tools in a…

Oana Rinaldi August 1, 2025

SQL

SQL Pivot Tables with CASE WHEN Logic

SQL Pivot Tables with CASE WHEN Logic SQL Pivot Tables with CASE WHEN Logic is a powerful technique that allows developers to transform rows into columns using SQL's conditional logic.…

Oana Rinaldi August 1, 2025

Shell / Bash

Build an HTTP Status Code Checker Using Bash For Loop + curl

Build an HTTP Status Code Checker Using Bash For Loop + curl Monitoring website availability is a common task for developers, sysadmins, and DevOps engineers. While there are plenty of…

Oana Rinaldi August 1, 2025

SQL

Optimize SQL Queries with Indexing: A Practical Walkthrough

Optimize SQL Queries with Indexing: A Practical Walkthrough SQL is a powerful language for querying databases, but with great power comes great responsibility—especially as your datasets grow. One of the…

Oana Rinaldi August 1, 2025

Java

@Scheduled: Write Robust Cron Jobs in Spring Boot

@Scheduled: Write Robust Cron Jobs in Spring Boot Running scheduled tasks is a common need in many backend applications — from sending emails at certain times, to cleaning up temporary…

Oana Rinaldi August 1, 2025

Java

@Transactional in Spring Boot: How It Actually Works (With Code)

@Transactional in Spring Boot: How It Actually Works (With Code) The @Transactional annotation is one of the most powerful — and potentially dangerous — features in Spring Boot. If used…

Oana Rinaldi August 1, 2025

JavaScript

JavaScript Object Deep Clone Techniques Without External Libraries

JavaScript Object Deep Clone Techniques Without External Libraries Cloning objects in JavaScript may seem trivial at first glance, but once nested structures come into play, things can get complicated fast.…

Oana Rinaldi August 1, 2025

Search Algorithms

Binary Search Algorithm in Python

🔹 Introduction Binary Search is a powerful searching algorithm used on sorted arrays or lists. It repeatedly divides the search interval in half, making it extremely efficient — much faster…

oanaunciuleanu@gmail.com August 1, 2025

Sorting Algorithms

Selection Sort Algorithm in Python

🔹 Introduction Selection Sort is a simple comparison-based sorting algorithm. It divides the input list into a sorted and an unsorted part and repeatedly selects the smallest (or largest) element…

oanaunciuleanu@gmail.com August 1, 2025