Ruby Tutorial

1. Ruby Introduction

What Ruby is, its relationship to Rails, installing it with rbenv/rvm, and hello world with irb.

2. Syntax and Variables

Ruby variables, types, symbols vs strings, string interpolation, arrays, hashes and control flow.

3. OOP in Ruby

Classes, attr_accessor, inheritance, modules and mixins, and the duck typing philosophy.

4. Blocks, Procs and Metaprogramming

Blocks and yield, Procs vs Lambdas, and an honest intro to method_missing and define_method.

5. Error Handling and Exceptions

begin/rescue/ensure, custom exception classes, retry, and why rescue Exception is a trap.

6. Testing with RSpec

describe/context/it, expectations and matchers, before hooks, and a complete RSpec example.

7. Gems and Bundler

Gemfile and Gemfile.lock, semantic versioning with ~>, and building a simple gem conceptually.

8. Ruby Interview Questions

Real Ruby interview questions and answers on blocks, procs, lambdas, duck typing and modules.