Solving problems with code, sharing practical tech insights, and leveling up together!
Learn how to replace sprawling if‑else logic in payment gateways and SaaS platforms by combining the Strategy and Factory patterns, with concrete Spring Boot examples, step‑by‑step code, and a progression from simple to abstract factories that enforce the Open‑Closed principle.
The author critiques typical AI chat tools as fleeting helpers and presents Hermes Agent as a resident, cross‑platform AI agent with memory and tool‑execution capabilities, detailing its features, Windows support, suitable user groups, setup steps, and practical limitations.
The article explains why Pod anti‑affinity often falls short, how TopologySpreadConstraints enforce a maxSkew balance across topology domains, why an “empty topology domain” can cause Pods to stay Pending, and provides a step‑by‑step guide to tightening domain scope and building custom Go scheduler plugins with the Kubernetes Scheduling Framework, while warning about dependency and version pitfalls.
This article explains why single‑node clusters cannot demonstrate true Kubernetes pod scheduling, recommends using Kind to create multi‑node clusters on Windows, and walks through the scheduler’s filtering and scoring steps with concrete experiments such as nodeSelector, affinity, taints, requests/limits, and preemption.
The article explains why modern systems avoid MD5 for password storage, details how Bcrypt’s deliberately slow, salted hashing thwarts brute‑force attacks, and shows that JWT provides stateless authentication whose security relies on signatures rather than encryption, while also discussing token revocation and DoS mitigation.
This article explains why LRU needs a doubly linked list, how to achieve O(1) LFU with two hash maps and a minFreq pointer, and why Redis uses approximate LRU and an 8‑bit Morris counter for LFU, providing full Java, Go, and Python implementations.
Most developers mistake model capability for system capability, leading to unstable agents; this article breaks down six essential modules—four‑layer architecture, execution model, memory system, framework choice, multi‑agent design, and observability—to guide engineers toward production‑ready AI agents.
This article walks through building a robust WSL2 development environment on Windows, covering an automated PowerShell backup script, Zsh + Oh My Zsh + Powerlevel10k terminal customization, and the installation of Python (using uv), Go, Node (via nvm), and Java (via SDKMAN!), plus best‑practice workspace organization.
This article walks through a step‑by‑step two‑pointer algorithm for LeetCode 80, showing how to delete duplicates in a sorted array in‑place so each element appears at most twice, with detailed code, pointer movement rules, and a generalization to K occurrences.
The author solves the classic Valid Sudoku challenge in Go, explaining why a fixed-size 9×9 array outperforms a generic map, how to map characters to zero‑based indices, compute sub‑grid positions, and maintain row, column, and block state efficiently.
