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shanab/numeric_2.rb

Created September 5, 2014 21:48
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Extending Numeric class to add currencies using method_missing
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numeric_2.rb
class Numeric
@@currencies = { dollar: 7.15, euro: 9.26, yen: 0.068 }
def method_missing(method_id, *args, &block)
singular_currency = method_id.to_s.gsub(/s$/, '').to_sym
if @@currencies.has_key?(singular_currency)
self * @@currencies[singular_currency]
else
super
end
end
end
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