Coding

2 tutorials · piyush

Bits on Wires and Waves: The Physical Layer

How do 1s and 0s actually travel through copper cables, fiber optics, and WiFi? This tutorial demystifies the physical layer of networking - the actual signals that carry your Rails responses across the world. You'll understand what's really happening in those Ethernet cables and WiFi signals.

Physical Layer Electrical Signals Fiber Optics WiFi Radio Waves Binary Encoding Bandwidth Latency

The Ruby Upgrade Guide You Wish You'd Read Years Ago

A comprehensive mental model of how Ruby, RubyGems, Bundler, and Rails fit together — and why upgrading Ruby is far less scary than it seems. Covers the five-layer architecture of a Rails app's dependency stack, how version managers work, the difference between bundle install and bundle update, and a step-by-step walkthrough of a real Ruby upgrade.

Ruby RubyGems Bundler Rails version management asdf dependency resolution Gemfile Gemfile.lock Ruby upgrades