From: Robert Klemme <shortcutter@...>
Date: 2006-11-05T21:55:16+09:00
Subject: Re: How to match last word?

camenix <vipeak@gmail.com> wrote:
> Hi,all
>    I has a script to match 'Transfer dbf to SQLServer', the last
> comand successfully ended.But I found no way to match last
> command.Whoever can help me?
>
> main.rb
> string='
> Program begin at 2006-11-05T15:01:13+0800
> Change image name to lower begin at 2006-11-05T15:01:13+0800
> Change image name to lower end at 2006-11-05T15:01:14+0800
> Transfer dbf to SQLServer begin at 2006-11-05T15:01:14+0800
> Transfer dbf to SQLServer end at 2006-11-05T15:01:15+0800
> Modify Tables begin at 2006-11-05T15:01:15+0800
> '
> re=/\n{0,1}(.+?)\s+(end\s+at)(.+?)\n/i
> re.match(string)
> puts $1,$2,$3,$4
>
> The string is came from  a file,so the "\n" maybe ommited,but
> /\n{0,1}(.+?)\s+(end\s+at)(.+?)(\n|\Z)/i didn't work.
> This form of regular expresion always match 'Change image name to
> lower'.($2)

>> string='
Program begin at 2006-11-05T15:01:13+0800
Change image name to lower begin at 2006-11-05T15:01:13+0800
Change image name to lower end at 2006-11-05T15:01:14+0800
Transfer dbf to SQLServer begin at 2006-11-05T15:01:14+0800
Transfer dbf to SQLServer end at 2006-11-05T15:01:15+0800
Modify Tables begin at 2006-11-05T15:01:15+0800
'
>> puts string.scan(%r{^(.*)\s+(?:begin|end) at .*$})
Program
Change image name to lower
Change image name to lower
Transfer dbf to SQLServer
Transfer dbf to SQLServer
Modify Tables
=> nil

Not the most efficient RX but seems to work - at least according to what I 
gather from your posting.

Kind regards

    robert