const_missing_lazy_loading

🎯 Lazy Load Constants with const_missing

const_missing is triggered when an undefined constant is accessed. You can use it to autoload classes or modules on demand, keeping startup time low and dependencies minimal.

module AutoLoader
  def const_missing(name)
    file = "./#{name.to_s.downcase}.rb"
    require file if File.exist?(file)
    const_get(name)
  end
end

class MyApp
  extend AutoLoader
end

# Accessing MyApp::User triggers require './user.rb'
# user = MyApp::User.new