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

Installation Setup

Install Ruby via RVM, rbenv, or system package

Install Rails via gem install

Set up bundler for dependency management

Configure environment variables (PATH, GEM_HOME)

Environment Setup

Install Ruby (RVM, rbenv, or system)

Install Rails

Install Bundler

Set PATH and GEM_HOME variables

Config Files

Gemfile

config/routes.rb

config/database.yml

config/environments/*.rb

Cli Commands

ruby script.rb

rails server

bundle install

rake db:migrate

Internationalization

Rails I18n gem

Locale YAML files

Date/time and number formatting per locale

UTF-8 encoding by default

Accessibility

Use semantic HTML in views

ARIA support for screen readers

Rails i18n for multilingual apps

Accessible error messages

Ui Styling

ERB templates for HTML

HAML or Slim templates

CSS frameworks integrated via Rails

JavaScript front-end frameworks (React, Vue) with Rails

State Management

Rails controllers manage request state

Session and cookies for user state

Redis for caching and background jobs

Database persistence with ActiveRecord

Data Management

ActiveRecord ORM

Direct SQL via ActiveRecord::Base.connection

Sequel ORM for alternative

NoSQL integrations via gems (Mongoid)