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Full Discussion: PERL: removing blank lines from multiple files
Top Forums Shell Programming and Scripting PERL: removing blank lines from multiple files Post 302354673 by hcclnoodles on Saturday 19th of September 2009 10:11:42 AM
Old 09-19-2009
PERL: removing blank lines from multiple files
Hi Guru's , I have a whole bunch of files in /var/tmp that i need to strip any blank lines from, so ive written the following script to identify the lines (which works perfectly).. but i wanted to know, how can I actually strip the identified lines from the actual source files ??





Code:
	my @all = qx{ls /var/tmp}; # perform an ls on the folder
	
	foreach (@all) {
				
		open(IN, "/var/tmp/$_");
			chomp(my $file = $_);
			my $counter = "0";
			while  (<IN>) {
				$counter++;
				if ($_ =~ /^$/) {
				  print "blank line found in $file at line number $counter\n";
                                  #something here to go and fix it in the actual file ?
				}
			}
		close(IN);
	}

Any help or advice on this would be greatly appreciated
 

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LEARN ABOUT SUSE

pfsinhdrgen

pfsinhdrgen(1)						      General Commands Manual						    pfsinhdrgen(1)

NAME

       pfsinhdrgen - Create a pfs stream with different exposures defined by hdrgen script.

SYNOPSIS

       pfsinhdrgen <sample.hdrgen>

DESCRIPTION

       This  program  reads  files  defined  in  given	hdrgen script and outputs them in a PFS stream. Each frame has a tag BV with corresponding
       brightness value (APEX standard). Larger BV corresponds to less exposure (darker image), necessary to capture a bright scene.

       The generated PFS stream is to be used with photo-metric calibration software and with generators of HDR images.

       HDRGEN script file is a plain text file in  which  each	line  contains:  <path_to_an_image>  <inverse_of_exposure_time_in_seconds>  <aper-
       ture_size> <iso_speed> 0

       In  most  cases	it  is	convenient to use the jpeg2hdrgen program to create such a file automatically. In case it could not parse the exif
       information from jpeg files, it is necessary to create this file by hand. Below are the sample contents of such file:

       <--- cut here: sample.hdrgen /var/tmp/images/img08.jpg 4 2.8 100 0 /var/tmp/images/img09.jpg 58.8235 2.8  100  0  /var/tmp/images/img10.jpg
       76.9231 2.8 100 0 /var/tmp/images/img11.jpg 322.581 2.8 100 0 /var/tmp/images/img12.jpg 400 2.8 100 0 <--- cut here: sample.hdrgen

EXAMPLES

       pfsinhdrgen sample.hdrgen | pfsview

	      View exposures defined in sample.hdrgen script.

SEE ALSO

       jpeg2hdrgen(1) pfshdrcalibrate(1)

BUGS

       Please report bugs and comments on implementation to Grzegorz Krawczyk <gkrawczyk@users.sourceforge.net>.

																    pfsinhdrgen(1)
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