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method

method_missing

Importance_2
v1_8_6_287 - Show latest stable - 0 notes - Class: Kernel
method_missing(...) public

Invoked by Ruby when obj is sent a message it cannot handle. symbol is the symbol for the method called, and args are any arguments that were passed to it. By default, the interpreter raises an error when this method is called. However, it is possible to override the method to provide more dynamic behavior. The example below creates a class Roman, which responds to methods with names consisting of roman numerals, returning the corresponding integer values.

   class Roman
     def romanToInt(str)
       # ...
     end
     def method_missing(methId)
       str = methId.id2name
       romanToInt(str)
     end
   end

   r = Roman.new
   r.iv      #=> 4
   r.xxiii   #=> 23
   r.mm      #=> 2000
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