Module: Cult::Drivers::Common::ClassMethods

Defined in:
lib/cult/drivers/common.rb

Instance Method Summary collapse

Instance Method Details

#memoize(method_name) ⇒ Object 



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# File 'lib/cult/drivers/common.rb', line 21

def memoize(method_name)
  old_method_name = "#{method_name}_unmemoized".to_sym

  alias_method old_method_name, method_name

  var_name = "@#{method_name}".to_sym

  define_method(method_name) do
    if !instance_variable_defined?(var_name)
      instance_variable_set(var_name, send(old_method_name))
    end
    instance_variable_get(var_name)
  end

  define_method("#{method_name}_unmemo!") do
    remove_instance_variable(var_name)
  end
end

#with_id_mapping(method_name) ⇒ Object

Lets us write a method “something_map” that returns => …, and also get a function “something” that returns the keys.



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# File 'lib/cult/drivers/common.rb', line 13

def with_id_mapping(method_name)
  new_method = method_name.to_s.sub(/_map\z/, '')
  define_method(new_method) do
    send(method_name).keys
  end
end