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Full Discussion: Perl while loop question
Top Forums Shell Programming and Scripting Perl while loop question Post 302340750 by d_kowalske on Tuesday 4th of August 2009 09:25:44 AM
Old 08-04-2009
Perl while loop question

Hi,
I am having trouble comparing two files of different lengths and extracting a needed value. File 2 has two columns of information that match up with a value from File 1. I use this as search criteria in an IF statement while both files are open. I would like to print File 1 and add the info from File 2(column 10) on the correct line based on my IF statement. I have never used a while statement before but I think its correct. Does it matter that they are of different lengths? I hope this is clear enough. Any suggestions are appreciated.
Thanks

Code:
#!/usr/bin/perl
use strict;
use warnings;
my $haul_file = "mack_haul.txt";
my $lands_files = "mack_land.txt";
open (M,">M.txt") || die "Cant open new";
open ("land",$lands_files) || die "cant open\n";
open ("haul",$haul_file) || die "Cant Open\n";
my @Land;
my @Haul;
my $landslines='';
my $haulline='';

while(my $haulline=<haul>){
   chomp $haulline;
      @Haul=split(/\t/,$haulline);
        while(my $landslines=<land>){
                chomp $landslines;
                @Land =split(/\t/,$landslines);
                                                
                                        
                                if ($Land[3]eq$Haul[2])
                                {
                                   print M "$landslines"."\t$Haul[10]\n";
                                }
                                }}}
 
close(M) || die "GG";
close("haul") || die "Cant close1";
close("land") || die "cant close2";

 

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RAR_LIST(3)								 1							       RAR_LIST(3)

RarArchive::getEntries - Get full list of entries from the RAR archive

       Object oriented style (method):

SYNOPSIS
public array RarArchive::getEntries (void ) DESCRIPTION
Procedural style: array rar_list (RarArchive $rarfile) Get entries list (files and directories) from the RAR archive. Note If the archive has entries with the same name, this method, together with RarArchive foreach iteration and array-like access with numeric indexes, are the only ones to access all the entries (i.e., RarArchive::getEntry and the rar:// wrapper are insufficient). PARAMETERS
o $rarfile - A RarArchive object, opened with rar_open(3). RETURN VALUES
rar_list(3) returns array of RarEntry objects or FALSE on failure. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 3.0.0 | | | | | | | Support for RAR archives with repeated entry | | | names is no longer defective. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 Object oriented style <?php $rar_arch = RarArchive::open('solid.rar'); if ($rar_arch === FALSE) die("Could not open RAR archive."); $rar_entries = $rar_arch->getEntries(); if ($rar_entries === FALSE) die("Could retrieve entries."); echo "Found " . count($rar_entries) . " entries. "; foreach ($rar_entries as $e) { echo $e; echo " "; } $rar_arch->close(); ?> The above example will output something similar to: Found 2 entries. RarEntry for file "tese.txt" (23b93a7a) RarEntry for file "unrardll.txt" (2ed64b6e) Example #2 Procedural style <?php $rar_arch = rar_open('solid.rar'); if ($rar_arch === FALSE) die("Could not open RAR archive."); $rar_entries = rar_list($rar_arch); if ($rar_entries === FALSE) die("Could retrieve entries."); echo "Found " . count($rar_entries) . " entries. "; foreach ($rar_entries as $e) { echo $e; echo " "; } rar_close($rar_arch); ?> SEE ALSO
RarArchive::getEntry, rar:// wrapper. PHP Documentation Group RAR_LIST(3)
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