[ruby-core:44145] Re: [ruby-trunk - Feature #5899][Feedback] chaining comparsions.

On Sun, Apr 01, 2012 at 02:30:31AM +0900, matz (Yukihiro Matsumoto) wrote:
> 
> Issue #5899 has been updated by matz (Yukihiro Matsumoto).
> 
> Status changed from Assigned to Feedback
> 
> I don't think changing "1 < b < 4" to "1 < b && b < 4" is that hard task.
> I am not sure it's worth allowing confusing "false < 4".
As false goes I would like to define sentinels by inheriting from FalseClass which is separate feature.
> 
> Matz.
> 
> ----------------------------------------
> Feature #5899: chaining comparsions.
> https://bugs.ruby-lang.org/issues/5899#change-25543
> 
> Author: neleai (Ondrej Bilka)
> Status: Feedback
> Priority: Normal
> Assignee: matz (Yukihiro Matsumoto)
> Category: Joke
> Target version: 
> 
> 
> 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.
> 
> puts "yes" if 1<2<3<4
> 
> class Fixnum
>   def <(a)
>     ((self<=>a)==-1)&&a
>   end
> end
> class FalseClass
>   def <(a)
>     false
>   end
> end
> 
> 
> 
> 
> -- 
> http://bugs.ruby-lang.org/

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