Ruby

Ruby

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Section 1: Getting Started

3Lessons ·
- 1: Installing Ruby and Using irb
  
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- 2: Anatomy of a Ruby Script
  
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- 3: Ruby Version Managers
  
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Section 2: Core Syntax

5Lessons ·
- 4: Variables and Types
  
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- 5: Control Flow Statements
  
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- 6: Arrays and Hashes
  
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- 7: Symbols and Ranges
  
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- 8: String Methods
  
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Section 3: Methods and Blocks

4Lessons ·
- 9: Defining Methods
  
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- 10: Blocks, Procs, and Lambdas
  
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- 11: Yield and Enumerators
  
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- 12: Method Missing
  
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Section 4: Object-Oriented Ruby

5Lessons ·
- 13: Classes and Objects
  
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- 14: Modules and Mixins
  
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- 15: Inheritance and Polymorphism
  
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- 16: Attr Accessors and Encapsulation
  
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- 17: Duck Typing in Ruby
  
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Section 5: Metaprogramming

4Lessons ·
- 18: method_missing and Dynamic Methods
  
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- 19: Open Classes and Monkey Patching
  
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- 20: define_method in Practice
  
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- 21: Refinements
  
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Section 6: Working with Data and Files

4Lessons ·
- 22: File I/O and Exceptions Revisited
  
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- 23: Working with JSON and YAML in Ruby
  
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- 24: Regular Expressions in Ruby
  
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- 25: Working with Dates and Times
  
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Section 7: Ruby Frameworks Overview

3Lessons ·
- 26: Overview of Rails vs Sinatra
  
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- 27: ActiveRecord Basics
  
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- 28: Rack Middleware Concepts
  
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Section 8: Ecosystem and Testing

3Lessons ·
- 29: Managing Gems with Bundler
  
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- 30: Writing Tests with RSpec
  
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- 31: Introduction to Rake Tasks
  
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Section 9: Practical Projects

5Lessons ·
- 32: Building a Command-Line Ruby Script
  
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- 33: Building a Small Gem
  
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- 34: Building a Basic Sinatra Web App
  
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- 35: Building a Simple File-Based Task Tracker
  
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- 36: Building a Text Processing Tool
  
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Section 10: Interview Practice

2Lessons ·
- 37: Common Ruby Interview Questions on Blocks and Procs
  
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- 38: Common Ruby Interview Questions on Metaprogramming
  
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Section 11: Data Structures and Algorithms in Ruby

4Lessons ·
- 39: Implementing a Linked List in Ruby
  
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- 40: Implementing a Stack and Queue
  
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- 41: Implementing Common Sorting Algorithms
  
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- 42: Big-O Notation with Ruby Examples
  
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Section 12: More Practice Exercises

4Lessons ·
- 43: Practice Exercise: Building a Command-Line Quiz Game
  
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- 44: Practice Exercise: Building a Simple Todo List Gem
  
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- 45: Practice Exercise: Building a Text Adventure Engine
  
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- 46: Practice Exercise: Building a Simple CSV Report Generator
  
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Section 13: Enumerable and Functional Style

4Lessons ·
- 47: The Enumerable Module in Depth
  
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- 48: Lazy Enumerators
  
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- 49: Comparable Module and Custom Sorting
  
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- 50: Functional-Style Method Chaining
  
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Section 14: More OOP Practice

4Lessons ·
- 51: Practice Exercise: Building a Class Hierarchy for a Zoo Simulation
  
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- 52: The Observer Pattern in Ruby
  
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- 53: The Singleton Pattern in Ruby
  
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- 54: Struct and OpenStruct for Lightweight Objects
  
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Section 15: More Testing

3Lessons ·
- 55: Writing Tests with Minitest
  
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- 56: Mocking and Stubbing in RSpec
  
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- 57: Test-Driven Development in Ruby
  
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Section 16: Enumerable and Comparable Modules In Depth

5Lessons ·
- 58: The Enumerable Module Methods: map, select, reduce
  
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- 59: each_with_object and each_slice
  
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- 60: group_by and partition
  
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- 61: The Comparable Module and <=>
  
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- 62: Custom Sortable Classes
  
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Section 17: Ruby Standard Library: Core Utilities

6Lessons ·
- 63: The Set Class
  
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- 64: Struct and OpenStruct
  
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- 65: Time and Date Classes
  
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- 66: FileUtils for File Operations
  
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- 67: Tempfile for Temporary Files
  
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- 68: Logger for Application Logging
  
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Section 18: Ruby Standard Library: Data and Security

5Lessons ·
- 69: Digest for Hashing (MD5, SHA)
  
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- 70: SecureRandom for Secure Tokens
  
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- 71: Base64 Encoding and Decoding
  
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- 72: JSON Module In Depth
  
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- 73: YAML Module In Depth
  
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Section 19: Ruby Standard Library: CLI and Text

4Lessons ·
- 74: OptionParser for CLI Argument Parsing
  
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- 75: ERB Templating
  
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- 76: StringScanner for Text Parsing
  
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- 77: Shellwords for Safe Shell Escaping
  
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Section 20: Ruby Networking

3Lessons ·
- 78: Net::HTTP In Depth
  
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- 79: Building a Simple TCP Server with Socket
  
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- 80: URI Module for Parsing URLs
  
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Section 21: Ruby on Rails Deep Dive

8Lessons ·
- 81: Rails MVC Architecture In Depth
  
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- 82: Active Record Associations
  
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- 83: Active Record Validations and Callbacks
  
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- 84: Rails Routing In Depth
  
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- 85: Action Controller Filters
  
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- 86: Rails Migrations In Depth
  
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- 87: Active Job for Background Processing
  
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- 88: Action Cable for WebSockets
  
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Section 22: Ruby Metaprogramming Deep Dive

4Lessons ·
- 89: instance_eval and class_eval
  
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- 90: Method Objects and UnboundMethod
  
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- 91: const_missing and Dynamic Constants
  
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- 92: Building a Simple DSL in Ruby
  
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Section 23: Ruby Design Patterns

5Lessons ·
- 93: The Null Object Pattern in Ruby
  
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- 94: The Factory Pattern in Ruby
  
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- 95: The Observer Pattern with Ruby's Observable Module
  
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- 96: The Decorator Pattern in Ruby
  
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- 97: The Strategy Pattern in Ruby
  
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Section 24: Ruby Concurrency

4Lessons ·
- 98: Threads in Ruby and the GIL
  
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- 99: Fibers Revisited In Depth
  
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- 100: Ractor for True Parallelism
  
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- 101: Mutex and Thread Synchronization
  
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Section 25: Ruby Testing Deep Dive

5Lessons ·
- 102: RSpec Matchers In Depth
  
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- 103: Shared Examples in RSpec
  
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- 104: Factory Bot for Test Data
  
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- 105: VCR for Mocking HTTP Requests
  
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- 106: Mutation Testing with Mutant
  
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Section 26: Ruby Gems and Packaging

4Lessons ·
- 107: Building and Publishing a Gem
  
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- 108: Gemspec Configuration
  
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- 109: Semantic Versioning for Gems
  
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- 110: Bundler Groups and Platforms
  
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Section 27: Ruby Performance

4Lessons ·
- 111: Profiling Ruby Code with ruby-prof
  
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- 112: Memory Profiling with memory_profiler
  
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- 113: JIT Compilation in Ruby (YJIT)
  
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- 114: Garbage Collection Tuning
  
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Section 28: More Practice Exercises

4Lessons ·
- 115: Practice Exercise: Building a Simple ActiveRecord-Style ORM
  
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- 116: Practice Exercise: Building a Rate Limiter with Redis
  
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- 117: Practice Exercise: Building a Simple Job Queue with Sidekiq
  
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- 118: Practice Exercise: Building a CLI Tool with Thor
  
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Section 29: More Interview Practice

4Lessons ·
- 119: Common Ruby Interview Questions on Modules vs Classes
  
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- 120: Common Ruby Interview Questions on Object Model
  
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- 121: Whiteboard Practice: Implementing a Linked List in Ruby
  
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- 122: Timed Mock Assessment on Core Ruby
  
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Section 30: Rails API Development

4Lessons ·
- 123: Building a JSON API with Rails
  
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- 124: API Versioning in Rails
  
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- 125: Rails Serializers (ActiveModel::Serializer)
  
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- 126: Rate Limiting with Rack::Attack
  
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Section 31: Rails Authentication and Authorization

4Lessons ·
- 127: Devise for Authentication
  
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- 128: Pundit for Authorization Policies
  
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- 129: JWT Authentication in Rails APIs
  
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- 130: OmniAuth for Social Login
  
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Section 32: Rails Testing Deep Dive

4Lessons ·
- 131: Request Specs in RSpec
  
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- 132: System Tests with Capybara
  
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- 133: Testing Background Jobs
  
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- 134: Testing Rails Serializers
  
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Section 33: Rails Performance

4Lessons ·
- 135: N+1 Query Detection with Bullet
  
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- 136: Eager Loading Associations
  
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- 137: Database Indexing for Rails Apps
  
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- 138: Caching Strategies in Rails (Fragment, Russian Doll)
  
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Section 34: Rails Deployment

4Lessons ·
- 139: Deploying Rails with Kamal
  
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- 140: Asset Pipeline vs Import Maps
  
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- 141: Environment-Specific Configuration
  
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- 142: Zero-Downtime Deployment for Rails
  
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Section 35: Sinatra and Lightweight Ruby Web Apps

3Lessons ·
- 143: Building a REST API with Sinatra
  
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- 144: Sinatra Middleware and Extensions
  
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- 145: Choosing Between Rails, Sinatra, and Hanami
  
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Section 36: More Ruby Language Deep Dive

5Lessons ·
- 146: Frozen String Literals and Immutability
  
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- 147: The Comparable Module Edge Cases
  
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- 148: Method Missing vs respond_to_missing?
  
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- 149: Refinements Revisited In Depth
  
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- 150: Pattern Matching with case/in (Ruby 3)
  
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Section 37: Ruby 3.x Modern Features

5Lessons ·
- 151: Ractor for Parallel Execution Revisited
  
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- 152: Rightward Assignment
  
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- 153: Hash Shorthand Syntax
  
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- 154: Endless Methods
  
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- 155: The it Implicit Block Parameter
  
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Section 38: More Data Structures in Ruby

5Lessons ·
- 156: Implementing a Doubly Linked List in Ruby
  
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- 157: Implementing a Trie in Ruby
  
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- 158: Implementing a Graph and BFS/DFS in Ruby
  
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- 159: Implementing a Min-Heap in Ruby
  
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- 160: Dynamic Programming Patterns in Ruby
  
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Section 39: More Practical Projects

5Lessons ·
- 161: Building a Blog Engine with Rails
  
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- 162: Building a Simple Task Management API
  
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- 163: Building a Real-Time Chat App with Action Cable
  
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- 164: Building a Subscription Billing System with Stripe
  
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- 165: Building a Multi-Tenant SaaS with Rails
  
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Section 40: Ruby Ecosystem Tools

4Lessons ·
- 166: RuboCop for Style Enforcement
  
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- 167: Solargraph for Language Server Support
  
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- 168: Rails Console Tips and Tricks
  
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- 169: Debugging with Pry and byebug
  
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Section 41: More Practice and Review

4Lessons ·
- 170: Practice Exercise: Building a Custom Validation DSL
  
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- 171: Practice Exercise: Building a State Machine with AASM
  
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- 172: Practice Exercise: Building a Simple Event Sourcing System in Ruby
  
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- 173: Code Review Checklist for Idiomatic Ruby
  
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Section 42: Final Practice and Mastery

5Lessons ·
- 174: Practice Exercise: Building a Simple Recommendation Engine
  
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- 175: Practice Exercise: Building a Content Moderation Pipeline
  
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- 176: Practice Exercise: Building a Multi-Step Wizard Form Backend
  
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- 177: Practice Exercise: Building a Simple Webhook Delivery System
  
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- 178: Whiteboard Practice: Implementing a Rate Limiter Algorithm
  
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Section 43: Ruby Interview Deep Dive

4Lessons ·
- 179: Common Ruby Interview Questions on Blocks vs Procs vs Lambdas Revisited
  
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- 180: Common Ruby Interview Questions on Rails Request Lifecycle
  
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- 181: Common Ruby Interview Questions on Database Optimization
  
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- 182: Interview Practice: System Design Basics for Ruby Backend Roles
  
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Section 44: Ruby Background Processing Deep Dive

4Lessons ·
- 183: Sidekiq Configuration and Concurrency
  
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- 184: Resque as an Alternative to Sidekiq
  
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- 185: Scheduling Recurring Jobs with Whenever
  
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- 186: Handling Job Failures and Retries
  
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Section 45: Ruby GraphQL

3Lessons ·
- 187: Building a GraphQL API with graphql-ruby
  
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- 188: Resolvers and Mutations in graphql-ruby
  
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- 189: N+1 Prevention in GraphQL with Batch Loading
  
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Section 46: Ruby Object Model Deep Dive

5Lessons ·
- 190: The Method Resolution Order (Ancestors Chain)
  
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- 191: BasicObject and the Root of the Hierarchy
  
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- 192: Object Equality: ==, eql?, equal?
  
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- 193: Duck Typing vs Type Checking in Ruby
  
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- 194: Class Reopening and Monkey Patching Risks
  
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Section 47: Ruby Hanami Framework Overview

3Lessons ·
- 195: Hanami Architecture Philosophy
  
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- 196: Building a Simple App with Hanami
  
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- 197: Comparing Hanami to Rails
  
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Section 48: Ruby gRPC and Protocol Buffers

4Lessons ·
- 198: Setting Up gRPC in Ruby
  
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- 199: Defining Protobuf Messages for Ruby Services
  
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- 200: Streaming RPCs in Ruby
  
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- 201: Error Handling in gRPC Services
  
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Section 49: Ruby Data Processing

5Lessons ·
- 202: Processing Large CSV Files Efficiently
  
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- 203: Batch Processing with find_each in Rails
  
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- 204: ETL Pipelines in Ruby
  
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- 205: Working with Apache Kafka from Ruby
  
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- 206: Parallel Processing with the parallel Gem
  
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Section 50: Ruby Search Integration

3Lessons ·
- 207: Elasticsearch Integration with Ruby
  
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- 208: Full-Text Search with pg_search
  
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- 209: Building a Faceted Search Feature
  
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Section 51: Ruby File Upload and Media

4Lessons ·
- 210: Active Storage for File Uploads
  
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- 211: Image Processing with MiniMagick
  
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- 212: Direct Uploads to S3
  
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- 213: Video Transcoding Pipelines in Ruby
  
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Section 52: Ruby Email and Notifications

4Lessons ·
- 214: Action Mailer In Depth
  
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- 215: Building a Notification System
  
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- 216: Email Testing with letter_opener
  
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- 217: Push Notifications from a Ruby Backend
  
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Section 53: Ruby Admin Panels

4Lessons ·
- 218: Building an Admin Panel with ActiveAdmin
  
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- 219: Building an Admin Panel with Avo
  
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- 220: Role-Based Access Control for Admin Panels
  
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- 221: Building Custom Admin Dashboards with Charts
  
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Section 54: Ruby Feature Flags and Experimentation

4Lessons ·
- 222: Implementing Feature Flags with Flipper
  
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- 223: A/B Testing Infrastructure in Rails
  
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- 224: Gradual Rollout Strategies
  
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- 225: Measuring Experiment Results Statistically
  
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Section 55: Ruby Monitoring and Observability

5Lessons ·
- 226: Application Performance Monitoring with Scout or New Relic
  
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- 227: Error Tracking with Sentry in Ruby
  
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- 228: Structured Logging with Semantic Logger
  
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- 229: Health Check Endpoints in Rails
  
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- 230: Distributed Tracing for Ruby Microservices
  
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Section 56: Ruby Docker and Deployment Deep Dive

4Lessons ·
- 231: Dockerizing a Rails Application
  
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- 232: Multi-Stage Docker Builds for Ruby
  
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- 233: Environment Variable Management with dotenv
  
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- 234: CI/CD Pipelines for Ruby Projects
  
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Section 57: Ruby Security Deep Dive

5Lessons ·
- 235: Brakeman for Static Security Analysis
  
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- 236: Strong Parameters and Mass Assignment Protection
  
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- 237: SQL Injection Prevention in ActiveRecord
  
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- 238: Content Security Policy in Rails
  
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- 239: Secrets Management with Rails Credentials
  
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Section 58: More Advanced Metaprogramming

5Lessons ·
- 240: Building a Simple ORM-Like DSL from Scratch
  
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- 241: define_method vs def for Dynamic Methods
  
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- 242: Class Macros Like has_many Explained
  
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- 243: Method Chaining and Fluent Interfaces
  
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- 244: Building a Simple Attribute Validation Macro
  
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Section 59: More Final Projects

6Lessons ·
- 245: Building a Job Board Application
  
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- 246: Building a Simple CRM Backend
  
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- 247: Building a Time-Tracking Application API
  
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- 248: Building a Social Bookmarking Service
  
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- 249: Building a Recipe Sharing Platform API
  
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- 250: Building a Simple Event Ticketing System
  
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