From: Robert Klemme <shortcutter@...>
Date: 2007-02-23T22:40:09+09:00
Subject: Re: File.open with line =~ /.../

On 23.02.2007 09:59, Rebhan, Gilbert wrote:
>  
> Hi,
> 
> -----Original Message-----
> From: Robert Klemme [mailto:shortcutter@googlemail.com] 
> Sent: Friday, February 23, 2007 9:15 AM
> To: ruby-talk ML
> Subject: Re: File.open with line =~ /.../
> 
> On 23.02.2007 08:36, Rebhan, Gilbert wrote:
>> Hi,
>>
>> i have a txtfile like that =
>>
>> bla1
>> foo=red
>>
>> bla2
>> foo=green
>>
>> bla3
>> foo=yellow
>>
>> and i want to get i.e. bla1 and the corresponding value of foo
>>
>> i tried with 
>>
>> File.open("Y:/test/sample.txt", "r").each do |line|
>>   puts $1<<' : '<< $3 if line =~ /(\w+)\s+(\w+=)(\w+)/
>> end
>>
>> but somehow the regex doesn't work ?!
>> whereas it works in the QuickRex Plugin for Eclipse
>>
>> Any ideas ?
> 
> /*
> If this is really the case I'd say the QuickRex Plugin is broken or you 
> feed different files.  Since you match for a non zero number of white 
> space characters before the equal sign, it should not match, since there
> 
> is none in the file contents you showed.  You could change to \s* or 
> leave it out completely.
> */
> 
> hmm, the QuickRex Plugin can evaluate with the Regular Expression
> Implementation for =
> 
> Java
> Jakarta Oro Perl 5
> Jakarta Oro Awk
> JRegex
> 
> 
> the regex
> (\w+)\r\n(\w+=)(\w+) works in all implementations except the Awk
> also the regex (\w+)\s+(\w+=)(\w+) works for all except the Awk
> implementation
> 
> so i get = $1 > bla1 $2 >foo $3 > red with both regex
> 
> Did only simple regex operations on one line in ruby until now.
> What's wrong with my regex ?

Maybe I was too fast - I overlooked that you are trying to match 
multiple lines.  In that case of course you have to feed multiple lines 
- not a single line at a time as Carlos pointed out.

Kind regards

	robert