Ruby

Feature #5899

Updated by nobu (Nobuyoshi Nakada) almost 10 years ago

Migration from python to ruby is problematic because ruby lacks certain features. 
 Most important python advantage is chained comparison 
 We must wrap every comparison like described below. 

 ```ruby 
 puts "yes" if 1<2<3<4 

 class Fixnum 
   def <(a) 
     ((self<=>a)==-1)&&a 
   end 
 end 
 class FalseClass 
   def <(a) 
     false 
   end 
 end 
 ``` 

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