From: Daniel Carrera <dcarrera@...>
Date: 2003-07-11T10:41:46+09:00
Subject: Re: Regular expression contradiction

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I don't know, but I can tell you that it works correctly in 1.8.0.
Therefore, it must have been a bug.

On Fri, Jul 11, 2003 at 10:37:57AM +0900, Gavin Sinclair wrote:
> Folks,
> 
> I'm having trouble extracting all the data I want from a string.  Please
> consider the following results:
> 
>     irb(main):014:0* xyz.class                       -> String
>     irb(main):015:0> xyz.length                      -> 500
>     irb(main):016:0> xyz =~ /TRANDATE/               -> 48
>     irb(main):017:0> xyz =~ /CHECKSUM/               -> 377
>     irb(main):018:0> xyz =~ /TRANDATE.*CHECKSUM/     -> nil
>     irb(main):019:0> xyz =~ /TRANDATE.*?CHECKSUM/    -> nil
>     irb(main):020:0> VERSION                         -> "1.6.5"
> 
> (I want to be using 1.8.0, but I have not solved my recently-described
> problem in building it on Cygwin.)
> 
> I'm sure you can all see the problem: "TRANDATE" occurs at position 48,
> and "CHECKSUM" at position 377.  Why on earth does (xyz =~
> /TRANDATE.*CHECKSUM/) not return 48?
> 
> (xyz.inspect) appears below.  Use an editor to collapse into one line to
> recreate it.
> 
> Thanks,
> Gavin
> 
> "TRANID\000\000\000\000\000\000\000\000\000ENGYAUS
> USR-TNS-210036784\001\002\000\023\000\023\000\000\
> 010TRANDATE\000\000\000\000\000\000\0002003-03-06,
> 11:01:26\001\003\000$\000\000\000\000\005INITRANID
> \000\000\000\000\000\000\000<)\351\005\000\000#\a\
> 000\000\005\000\002\000\002\000\000\000\000\000\00
> 0\000\000\000\000\000\003\000\000\0006\000\000\000
>    \000\003\000\000\000INITCOU_FST\000\000\003\001
> \000\000\000\002\000\000\000\000\000\000\000\000\0
> 00\000\000\001\001\000\010\000\005\000\000\005VERS
> ION\000\000\000\000\000\000\000\000r5_a3\001\002\0
> 00\001\000\000\000\000\005DUMMY\000\000\000\000\00
> 0\000\000\000\000\000\000<)\245\006\000\000\300\01
> 0\000\000\006\000\003\000\f\000\000\000\000\000\f\
> 000\000\000\000\000\004\000\000\000U\001\000\000
>  \000\004\000\000\000G003\000\000\000\000\000\000\
> 000\000\000\003\001\000\000\000\003\000\000\000\00
> 0\000\000\000\000\000\000\000\001\001\000\010\000\
> 005\000\000\005VERSION\000\000\000\000\000\000\000
> \000r5_a3\001\002\000\n\000\n\000\000\aDPID\000\00
> 0\000\000\000\000\000\000\000\000\0005240132312\00
> 1\003\000\001\000\001\000\000\aCHECKSUM\000\000\00
> 0\000\000\000\0001\001\004\000\n\000\006\000\000\0
> 05ROLR\000\000\000\000\000\000\000\000\000\000\000
> AGLUSR\001\005\000\003\000\000\000\001\005ROLRCONT
> EXT\000\000\000\000\001\006\000F\000\000\000\001\0
> 05ROLRDESC\000\000\000\000\000\000\000\001\a\000\f
> \000\f\000\000\aNETRCPTPT\000\000\000\000\000\000D
> UKEH"
> 
> 
> 

- -- 
Daniel Carrera         | OpenPGP fingerprint:
Graduate TA, Math Dept | 6643 8C8B 3522 66CB D16C D779 2FDD 7DAC 9AF7 7A88
UMD  (301) 405-5137    | http://www.math.umd.edu/~dcarrera/pgp.html
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