Latest Posts

Welcome to my note. I write technical articles, tutorials, and practical tips.

May 2026

• 2026-05-04 Using AWS Cognito for Your App Service · devops · aws, cognito, authentication, api-gateway, lambda, security, devops

• 2026-05-03 My Daughter’s Drawing: The World Is Money · journal · journal, family, drawing, daughter

• 2026-05-02 AWS Account Access Guide: Admin, Developer, Tester, Operator, Finance, Auditor, and CI/CD · devops · aws, iam, identity-center, devops, security, billing, cicd

April 2026

• 2026-04-30 MySQL Data Export and Import Guide · devops · mysql, database, backup, restore, docker, devops

• 2026-04-29 Ghostty for iTerm2 Users · development · ghostty, iterm2, terminal, macos, cli

• 2026-04-27 Dell UltraSharp Monitor Buying Guide · life · dell, ultrasharp, monitor, hardware, buying-guide

• 2026-04-26 Computer Networking from First Principles · development · networking, computer-networks, tcp-ip, ethernet, dns, http, wireshark

• 2026-04-25 OpenClaw Mac-to-Mac Migration Guide · devops · openclaw, migration, macos, backup, devops, operations

• 2026-04-24 Building a Private Jekyll Documentation Site on Cloudflare with Google Login · devops · jekyll, cloudflare, pages, access, google, github, zero-trust, security, devops

• 2026-04-22 Supabase + AWS Lambda + Vercel: A Practical Full-Stack Sample Project · devops · supabase, aws, lambda, vercel, auth, jwt, rls, react, devops

• 2026-04-22 Practical Guidance for Using Supabase · devops · supabase, postgres, backend, auth, rls, devops

• 2026-04-20 Comprehensive Guide: Using Vercel for a React + Next.js Web App · devops · vercel, nextjs, react, deployment, devops

• 2026-04-17 direnv on macOS with zsh: a comprehensive guide · development · direnv, macos, zsh, shell, environment, development

• 2026-04-17 ripgrep (rg) on macOS: A Practical Guide · development · ripgrep, macos, terminal, cli, search

• 2026-04-10 How to Build a Roblox Game: A Comprehensive Guide · development · roblox, luau, game-development, tutorial, beginner

• 2026-04-06 AWS Lambda + API Gateway Guide · devops · aws, lambda, api-gateway, authentication, serverless, devops

• 2026-04-06 Cloudflare Images: Comprehensive Guide · devops · cloudflare, images, cdn, workers, r2, devops

• 2026-04-06 Amazon ECS Express Mode · devops · aws, ecs, fargate, containers, devops

• 2026-04-03 Cloudflare-hosted EmDash with D1 + R2 + Access · devops · cloudflare, emdash, workers, d1, r2, access, devops

March 2026

• 2026-03-23 AWS NAT Instance Guide for Multiple Private EC2 Servers · devops · aws, vpc, ec2, nat-instance, networking, devops, cloudflare-tunnel

• 2026-03-22 Cloudflare Workers + Access: Make Your API Private to Only You · devops · cloudflare, workers, access, zero-trust, security, devops

• 2026-03-22 Cloudflare Observability Guide · devops · cloudflare, observability, workers, logpush, otel, devops

• 2026-03-22 Cloudflare CLI Tools Guide · devops · cloudflare, wrangler, cloudflared, r2, cli, devops

• 2026-03-22 cloudflared Comprehensive Guide · devops · cloudflare, cloudflared, tunnel, zero-trust, devops

• 2026-03-21 Cloudflare Architecture Examples with Mermaid Diagrams · development · cloudflare, architecture, mermaid, workers, pages, zero-trust, r2, d1, durable-objects, queues

• 2026-03-19 Cloudflare: A Comprehensive Practical Guide · development · cloudflare, dns, cdn, waf, zero-trust, sase, workers, pages, r2, mermaid

• 2026-03-15 Yesterday in One Cartoon · journal · journal, cartoon, friendship, play

• 2026-03-15 Wrong Word, Right Confidence · journal · journal, cartoon, family, humor, language

• 2026-03-11 We are all busy. · journal · journal, cartoon, coding, roblox

• 2026-03-10 Meet My Note-Updater · journal · journal, cartoon, writing, assistant

• 2026-03-10 OpenClaw Multi-Agent on Mac mini with Slack · development · openclaw, slack, mac-mini, multi-agent, guide

• 2026-03-09 Tiny Spice Warrior · journal · journal, cartoon, malatang

• 2026-03-07 WFH Wins: Snacks, Sunlight, and My Real Team · journal · journal, cartoon, work-from-home

• 2026-03-07 99 Nights in the Forest (Roblox) Survival Guide: How to Survive as Long as Possible · life · roblox, gaming, survival, guide, mac, pc

• 2026-03-07 One More Prompt at 3 AM · journal · journal, cartoon

• 2026-03-05 Modern CSS Guide for Developers Returning After 10 Years · development · css, frontend, guide, modern-web

• 2026-03-05 Building an Apple-style Scroll Experience (Like the MacBook Neo Page) · development · css, frontend, scroll-animation, ux, guide

• 2026-03-05 OpenClaw Mac Mini M4 Setup Guide (macOS Apple Silicon) · development · mac-mini, apple-silicon, setup, macos

• 2026-03-04 Docker Multi-Stage Builds for Smaller and Safer Images · devops · docker, containers, cicd, performance

• 2026-03-03 OpenClaw Slack Setup · development · slack, setup, collaboration, productivity

February 2026

• 2026-02-19 SPM Mongdol 87 (PL87W) Manual and Warranty · life · keyboard, manual, warranty, hardware

• 2026-02-19 How to Play Windows PC Games on Your Mac Using Steam Remote Play · life · gaming, steam, mac, remote-play

January 2026

• 2026-01-19 TypeScript 5.9 Study Guide (for JavaScript, Node.js, and React Developers) · development · typescript, javascript, nodejs, react

• 2026-01-19 tmux: A Comprehensive Guide · development · tmux, terminal, cli, productivity

• 2026-01-19 System-Style SwiftUI Views Cheat Sheet · development · swiftui, ios, apple, ui

• 2026-01-19 Full MUI AppShell (React 19 + MUI v7): Complete Example · development · react, mui, frontend, appshell

• 2026-01-19 FileManager.SearchPathDirectory (Swift / Foundation) · development · swift, foundation, filemanager, ios

• 2026-01-19 Diffable Data Sources in UIKit (UITableView + UICollectionView): Modern Swift 2026 · development · swift, uikit, ios, diffable-data-source

December 2025

• 2025-12-31 Extracting Only the Audio from a Video on iOS (Swift) · development · ios, avfoundation, audio, swift

• 2025-12-31 Firebase iOS Backend with Auth, AWS S3 Files, and Optional FastAPI API (Part 5) · development · firebase, ios, fastapi, aws, s3, auth, swift

• 2025-12-31 Firebase iOS Backend with Auth, AWS S3 Files, and Optional FastAPI API (Part 4) · development · firebase, ios, fastapi, aws, s3, auth, docker

• 2025-12-31 Firebase iOS Backend with Auth, AWS S3 Files, and Optional FastAPI API (Part 3) · development · firebase, ios, fastapi, aws, s3, auth

• 2025-12-31 Firebase iOS Backend with Auth, AWS S3 Files, and Optional FastAPI API (Part 2) · development · firebase, ios, fastapi, aws, s3, auth

• 2025-12-31 Firebase iOS Backend with Auth, AWS S3 Files, and Optional FastAPI API (Part 1) · development · firebase, ios, fastapi, aws, s3, auth

• 2025-12-31 Firebase for Your iOS App with a Python/FastAPI Backend · development · firebase, ios, fastapi, backend

• 2025-12-21 AWS Elastic Beanstalk Practical Guide for Deploying Python APIs (FastAPI) · devops · aws, elastic-beanstalk, fastapi, deployment

• 2025-12-15 Apple Developer Identifiers and App Groups for iOS Devs · development · ios, apple-developer, app-groups, provisioning

November 2025

• 2025-11-21 A Practical Guide to nonisolated in Swift Concurrency · development · swift, concurrency, actors, nonisolated

• 2025-11-20 Swift Result Builder: A Comprehensive Guide (2025) · development · swift, resultbuilder, dsl, swiftui

• 2025-11-16 SwiftUI ViewBuilder: A Comprehensive Guide (2025) · development · swiftui, viewbuilder, swift, ios

• 2025-11-15 Swift Macros in 2025: A Practical Guide · development · swift, macros, metaprogramming, xcode

• 2025-11-13 Unified Logging System for Swift Developers: Production Guide (iOS & macOS) · development · swift, oslog, logging, ios, macos

• 2025-11-05 Swift Logging for iOS and macOS: A Practical Guide · development · swift, oslog, logging, ios, macos

• 2025-11-04 Diagnosing Performance Issues in iOS Apps · development · ios, performance, instruments, profiling

• 2025-11-01 Swift + Xcode Library: Build, Document & Share (Step-by-Step) · development · swift, xcode, spm, library, documentation

• 2025-11-01 Swift Sendable: A Practical Step-by-Step Guide (2025) · development · swift, concurrency, sendable, swift6

October 2025

• 2025-10-18 macOS Shortcut: Insert Today’s Date · productivity · macos, shortcuts, productivity, automation

• 2025-10-17 The SwiftUI Observation Guide: Observable, Bindable, and Friends (2025) · development · swiftui, observation, swift, ios

• 2025-10-16 Media Playback Programming for iOS and macOS (Step-by-Step, with Runnable Code) · development · ios, macos, avfoundation, avkit, media, swift

• 2025-10-14 Copyable vs Noncopyable in Swift: A Friendly, Step-by-Step Guide · development · swift, ownership, copyable, noncopyable, concurrency

• 2025-10-05 Thanksgiving Day · journal · journal, drawing, character