localhost vs 127.0.0.1 vs 0.0.0.0: Network Binding Explained
Why localhost, 127.0.0.1, 0.0.0.0, and * behave differently for MySQL clients and services, and how to find and fix a local port conflict between Docker and SSH.
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Securing AWS Credentials: aws-vault vs 1Password
Storing long-lived AWS access keys in ~/.aws/credentials is a common anti-pattern; aws-vault and the 1Password AWS Shell Plugin both fix it with short-lived STS tokens.
Ruby Debugging in VS Code: Shopify LSP, rdbg, and RSpec
How to wire up VS Code for Ruby debugging with the Shopify Liquid LSP, the rdbg debugger from Ruby's debug gem, and launch configs for RSpec, Minitest, and Cucumber.
Signed React Native Android APKs from GitHub Actions
A GitHub Actions pipeline that decodes a base64 keystore from repository secrets and produces a signed React Native Android APK on every push.
Optimizing Android Builds in GitHub Actions
Android builds in GitHub Actions run 10-30 minutes unoptimized; layered Gradle and Yarn caching plus scoped environment secrets get that down to a few minutes.
PostgreSQL 18: What's New and How to Upgrade
PostgreSQL 18 adds better query parallelism, parallel logical replication apply, and more flexible partitioning, plus the pg_upgrade and dump/restore paths to get there.
Migrating a GCP Classic Load Balancer to Global External
GCP lets you migrate a Classic Application Load Balancer to the Global External Load Balancer with a staged, four-state rollout that avoids downtime.
Closures, Blocks, and Iterators Across Six Languages
A working comparison of how Python, JavaScript, Ruby, PHP, Rust, and Go implement closures and lazy iteration, with a runnable counter and generator example for each.
JavaScript Engines in React Native: JSC vs. Hermes
React Native's default JS engine moved from JSC to Hermes for faster startup and lower memory use, and here is how to control which one your build uses.
Enabling Local HTTPS for Development and Debugging
Local HTTPS matters because browser APIs like Service Workers require a secure context, and this covers Caddy, Nginx with mkcert, Puma-dev, and Cert-Manager.