Learn RUBY with Real Code Examples

Updated Nov 17, 2025

Introduction & Fundamentals Setup & Configuration Architecture & Deep Internals Performance & Security Development Workflow Learning & Career Growth Business & Strategy Examples

Practical Examples

Build a CRUD web app with Rails

Create a background job with Sidekiq

Automate file processing scripts

Develop APIs with Sinatra

Troubleshooting

Resolve gem dependency conflicts

Fix undefined method or NoMethodError

Handle memory leaks in long-running scripts

Debug Rails routing and ActiveRecord issues

Testing Guide

Unit tests with RSpec

Behavior-driven testing with Cucumber

Integration tests for Rails apps

Continuous integration with GitHub Actions

Deployment Options

Deploy via Heroku

Docker containers

Capistrano or Mina for server deployment

Cloud platform deployment (AWS/GCP)

Tools Ecosystem

Ruby on Rails

Sinatra

RSpec for testing

Pry/Byebug for debugging

Bundler for dependency management

Integrations

PostgreSQL/MySQL databases

Redis caching

Sidekiq for background jobs

AWS/GCP/Azure cloud

REST and GraphQL APIs

Productivity Tips

Use Rails generators

Follow DRY and convention-over-configuration

Use pry for debugging

Organize gems with Bundler

Challenges

Build a blog app with Rails

Automate CSV file processing

Create a simple e-commerce platform

Implement a background job queue with Sidekiq