From: Luiz Angelo Daros de Luca <luizluca@...>
Date: 2011-07-23T04:13:35+09:00
Subject: Re: Regexp inconsistency

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Hello Camargo,

Ruby is right. The regexp matches the string.

$ ruby -e 'p (/ (\w+(\-\w+)?) \. (log|txt) [\.\-]? (\d{1}) ( \. (gz|bz2))?
/x).match("net-snmpd.log-20110629.bz2")'
#<MatchData "net-snmpd.log-2" 1:"net-snmpd" 2:"-snmpd" 3:"log" 4:"2" 5:nil
6:nil>

If you need that the whole string should match, and not part of it, you need
to end your regexp with "$", like:

/ (\w+(\-\w+)?) \. (log|txt) [\.\-]? (\d{1}) ( \. (gz|bz2))? $/x

Also, I recommend that you start your regexp with "^"

/^ (\w+(\-\w+)?) \. (log|txt) [\.\-]? (\d{1}) ( \. (gz|bz2))? $/x

This one should do the job.

Regards,

---
     Luiz Angelo Daros de Luca, Me.
            luizluca@gmail.com


2011/7/22 Carlos Camargo <camargo.cr@gmail.com>

> I observed a inconsistent behavior between ruby (ruby 1.8.6 (2009-06-08
> patchlevel 369) [x86_64-linux]), running in my host, and ruby in
> www.rubular.com (reports "Rubular runs on Ruby 1.8.7."). The expression:
> / (\w+(\-\w+)?) \. (log|txt) [\.\-]? (\d{1}) ( \. (gz|bz2))? /x
> in my host returns (among others):
> net-snmpd.log-20110629.bz2
>
> In rubular site, recognize (correctly, I suppose!) just until:
> net-snmpd.log-2 (stop here, i.e. don't recognize the string).
>
> Thanks for any help! (Upgrade ruby to 1.9 isn't an option!)
> Camargo
>
> NB: My code (just for test) is:
> #! /usr/bin/ruby -w
>
> require 'find'
>
> re_logdir = Regexp.new(/\/log$|\/log\/|\/logs$|\/logs\//)
> dias = 5
>
> ###
> a='(\w+(\-\w+)?)'
> d='(\d{4}[\.\-]?\d{2}[\.\-]?\d{2})'
> h='(\d{2}[\.\-]?\d{2}[\.\-]?\d{2,6})'
> l='(log|txt)'
> z='(gz|bz2)'
> n1='(\d{1})'
> s='[\.\-]'
>
> re_logfile = Regexp.new(/ #{a} \. #{l} #{s}? #{n1} ( \. #{z})? /x )
> p re_logfile
>
> Find.find('/') do |f|
>  if File.file?(f) and
>     re_logdir.match( File.dirname(f) ) and
>     re_logfile.match( File.basename(f) )
>     p f
>  end
> end
>
> --
> Posted via http://www.ruby-forum.com/.
>
>

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