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  1.  
  2. class Numeric
  3.   @@currencies = {'dollar' => 1, 'yen' => 0.013, 'euro' => 1.292, 'rupee' => 0.019}
  4.   def method_missing(method_id)
  5.     singular_currency = method_id.to_s.gsub( /s$/, '')
  6.     if @@currencies.has_key?(from_currency)
  7.       self / @@currencies[from_currency]
  8.     else
  9.       super
  10.     end
  11.   end
  12.   def in(symbol) 
  13.     @@currencies = {'dollar' => 1, 'yen' => 0.013, 'euro' => 1.292, 'rupee' => 0.019}
  14.     singular_currency = symbol.to_s.gsub( /s$/, '')
  15.     if @@currencies.has_key?(from_currency)
  16.       self * @@currencies[from_currency]
  17.     end
  18.   end      
  19. end
  20.  
Success #stdin #stdout 0s 4760KB
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https://ideone.com/qoFhF
language:
Ruby (ruby 2.5.5)
created:
14 years ago
visibility:
public

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