Data stream variables

[Alain Helfenstein]

Hi

I want to print all lines wihtch contains the string "Open" from a bunch
of 'xml' files. Additionally I want to print the filename and the line
number of the match.

The problem with the following snippet is, that the variable '$.' does
not reset the line number at the beginning of a new file.

That menas, the printed file numbers are not correct except for the
first file of '*.xml'

ruby -n -e 'puts ($FILENAME + " " + $..to_s + "" + $_) if /Open/' *.xml

Does anybody have a idea, on how to print the correct line number?

Thanks a lot for your answer, Alain.

 

[Andrew Timberlake]

[Note: parts of this message were removed to make it a legal post.]

wrote:

Hi

I want to print all lines wihtch contains the string "Open" from a bunch
of 'xml' files. Additionally I want to print the filename and the line
number of the match.

The problem with the following snippet is, that the variable '$.' does
not reset the line number at the beginning of a new file.

That menas, the printed file numbers are not correct except for the
first file of '*.xml'

ruby -n -e 'puts ($FILENAME + " " + $..to_s + "" + $_) if /Open/' *.xml

Does anybody have a idea, on how to print the correct line number?

Thanks a lot for your answer, Alain.

Does it all have to be done in ruby?
Why not
ls *.xml | xargs ruby -n -e 'puts ($FILENAME + " " + $..to_s + "" + $_) if
/Open/'

--
Andrew Timberlake
http://ramblingsonrails.com
http://www.linkedin.com/in/andrewtimberlake

"I have never let my schooling interfere with my education" - Mark Twain

 

[Alain Helfenstein]

On Mon, Jan 12, 2009 at 3:21 PM, Alain Helfenstein
<[email protected]

Does it all have to be done in ruby?
Why not
ls *.xml | xargs ruby -n -e 'puts ($FILENAME + " " + $..to_s + "" + $_)
if
/Open/'

--
Andrew Timberlake
http://ramblingsonrails.com
http://www.linkedin.com/in/andrewtimberlake

"I have never let my schooling interfere with my education" - Mark Twain

Thanks a lot for your answer.

Sadly I'm running Windows XP.

But I try to get GnuWin32 running...

Alain

 

[Andrew Timberlake]

[Note: parts of this message were removed to make it a legal post.]

wrote:

Thanks a lot for your answer.

Sadly I'm running Windows XP.

But I try to get GnuWin32 running...

Alain

Alain

Sorry, I made a mistake with my answer above. Instead of using xargs (which
was exactly the same as your method - actually)
Use find to make sure ruby gets a unique file each time:
find *.xml -exec ruby -n -e 'puts ($FILENAME + " " + $..to_s + "" + $_) if
/Open/' {} \;
--still doesn't help on Windows though

Instead of trying to do this in a one-liner, save the following as a file:
ARGV.each do |filename|
File.open(File.join(File.dirname(__FILE__), filename)) do |file|
while line = file.gets
puts (filename + " " + $..to_s + "" + $_) if line =~ /Open/
end
end
end

And then run:
ruby <filename> *.xml

Hopefully that helps

--
Andrew Timberlake
http://ramblingsonrails.com
http://www.linkedin.com/in/andrewtimberlake

"I have never let my schooling interfere with my education" - Mark Twain

 

[Robert Klemme]

I want to print all lines wihtch contains the string "Open" from a bunch
of 'xml' files. Additionally I want to print the filename and the line
number of the match.

The problem with the following snippet is, that the variable '$.' does
not reset the line number at the beginning of a new file.

That menas, the printed file numbers are not correct except for the
first file of '*.xml'

ruby -n -e 'puts ($FILENAME + " " + $..to_s + "" + $_) if /Open/' *.xml

Does anybody have a idea, on how to print the correct line number?

Thanks a lot for your answer, Alain.

I'm not Alain, but... Just kidding.

Here's how to do it:

ruby -ne 'puts "#$FILENAME #$. #$_" if /Open/; $.=0 if ARGF.eof?' *.xml

Cheers

robert

 

[Andrew Timberlake]

[Note: parts of this message were removed to make it a legal post.]

I'm not Alain, but... Just kidding.

Here's how to do it:

ruby -ne 'puts "#$FILENAME #$. #$_" if /Open/; $.=0 if ARGF.eof?' *.xml

Cheers

robert

I was wondering if you could reset the line counter but didn't think of just
setting $. = 0
Sometimes ruby is just too easy I still sometimes think things need to
be more complicated.

--
Andrew Timberlake
http://ramblingsonrails.com
http://www.linkedin.com/in/andrewtimberlake

"I have never let my schooling interfere with my education" - Mark Twain

 

[Robert Klemme]

[Note: parts of this message were removed to make it a legal post.]

I'm not Alain, but... Just kidding.

Here's how to do it:

ruby -ne 'puts "#$FILENAME #$. #$_" if /Open/; $.=0 if ARGF.eof?' *.xml

I was wondering if you could reset the line counter but didn't think of just
setting $. = 0

IMHO the tricky bit is to know *when* to reset, i.e. to know that
ARGF#eof? signals the end of a single file and not all files.

Sometimes ruby is just too easy I still sometimes think things need to
be more complicated.

The other area where I simplified your piece of code is the string
handling. Btw, when String interpolation (i.e. #$GLOBAL or #{expr}) you
do not need the explicit to_s.

Kind regards

robert