Ruby Skill

Style & Conventions

• Follow the RuboCop Ruby Style Guide: https://github.com/rubocop/ruby-style-guide

• Always follow the repository's existing RuboCop config — run bundle exec rubocop before finalizing changes.

• 2-space indentation.

• Single quotes for strings; double quotes only when interpolation or special chars are needed.

• Lambda syntax: -> (stabby lambda).

• Add # frozen_string_literal: true at the top of every Ruby file except migrations, patches, and specs.

• Avoid Feature Envy — methods should use their own object's data, not excessively reach into other objects:

  # Bad - Feature Envy
  def calculate_total
    order.items.sum { |item| item.price * item.quantity * item.discount }
  end