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extend_for_class_methods

🚀 Extend Modules to Add Class Methods​

Use extend to add module methods as class methods. This is handy for providing utility methods directly on the class. Unlike include, extend modifies the calling class’s singleton class.

module Finder
  def find(id)
    # look up by id
  end
end

class Record
  extend Finder
end

Record.find(1)