ruby-patterns

What problem does it solve?

Writing clean, efficient, and maintainable Ruby code requires familiarity with common idioms, established design patterns, and powerful metaprogramming techniques. Without this knowledge, code can become verbose, inefficient, or difficult to extend.

Core Features & Use Cases

• Common Idioms: Quick reference for conditional assignment, array/hash shortcuts, enumerable methods, and string operations for concise and expressive code.
• Design Patterns: Detailed instructions for Creational (Factory, Builder, Singleton), Structural (Decorator, Adapter, Composite), and Behavioral (Strategy, Observer, Command) patterns.
• Metaprogramming Techniques: Guidance on dynamic method definition, method_missing, class macros (DSLs), and module inclusion hooks for flexible and powerful code.
• Use Case: A Ruby developer is refactoring a legacy application and wants to improve its structure, readability, and performance. This Skill provides a catalog of patterns and techniques, from simple idioms to advanced metaprogramming, to elevate the codebase to modern Ruby standards.

Quick Start

Conditional Assignment (set if nil)

value ||= default_value

Array creation shortcut

%w[apple banana orange] # => ["apple", "banana", "orange"]

Enumerable transformation

array.map(&:upcase) # => ["APPLE", "BANANA"]

Guard Clause

def process(user) return unless user&.active?

Main logic

end