From: Daniel Berger <djberg96@...>
Date: 2009-08-05T15:27:08+09:00
Subject: Re: Bizarre Range behavior



> -----Original Message-----
> From: Yukihiro Matsumoto [mailto:matz@ruby-lang.org]
> Sent: Tuesday, August 04, 2009 10:56 PM
> To: ruby-talk ML
> Subject: Re: Bizarre Range behavior
> 
> Hi,
> 
> In message "Re: Bizarre Range behavior"
>     on Wed, 5 Aug 2009 05:32:37 +0900, Rob Biedenharn
> <Rob@AgileConsultingLLC.com> writes:
> 
> |Knowing this, here's an even more bizzare-looking example:
> |
> |irb> "19".succ
> |=> "20"
> |irb> ("2".."19").to_a
> |=> []
> |irb> ("2"..."20").to_a
> |=> ["2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13",
> |"14", "15", "16", "17", "18", "19"]
> 
> What if I sprinkle more magic to the language and change String#upto
> to generate numerical sequences when all characters in edges are
> digits, so that
> 
> irb> ("2".."19").to_a
> => ["2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13",
> "14", "15", "16", "17", "18", "19"]
> irb> ("2"..."20").to_a
> => ["2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13",
> "14", "15", "16", "17", "18", "19", "20"]
> 
> Any opinion?  I already made a patch for trunk.

I vote against. If people want numeric ranges, it's their job to use
numerics, not magically convert stringy numbers into actual numbers. This
isn't Perl after all.

Regards,

Dan