gist: 30200


  
    
      Ruby #
    
    
      
      
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              # Feeling Lispy?
 
number = 1234
(def method_missing m ,s ,*a ,&b
  (s.send m ,*a ,&b) end)
 
# Ruby 1.8.6 w/ ActiveSupport
(puts (reverse (join (collect (in_groups_of (reverse (Array (chars (String number)))) ,3) ,&:join) ,",")))
 
# Ruby 1.8.7+, no ActiveSupport dependency
(puts (reverse (join (collect (each_slice (reverse (Array (chars (String number)))) ,3) ,&:join) ,",")))
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