Module: Mutant::Result::ClassMethods

Defined in:
lib/mutant/result.rb

Overview

Class level mixin

Instance Method Summary collapse

Instance Method Details

#sum(name, collection) ⇒ undefined

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Generate a sum method from name and collection

Parameters:

  • name (Symbol)

    the attribute name on collection item and method name to use

  • collection (Symbol)

    the attribute name used to receive collection

Returns:

  • (undefined)

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# File 'lib/mutant/result.rb', line 51

def sum(name, collection)
  define_method(name) do
    public_send(collection).map(&name).reduce(0, :+)
  end
  memoize(name)
end