08-28-2008
Perl - Compare 2 Arrays
Hi all,
I have the following script where the contents of file1 and file2 would be something like this:
file1:
56790,0,0,100998765
89756,0,0,100567876
867645,1,3,678777654
file2:
56790,0,0,100998765
65776,0,0,4766457890
+5896,0,0,675489876
What I then want to do is check if each of the 4 comma separated values on each line exists somewhere in the other file. So in the above case clearly the line that says 56790,0,0,100998765 is in both files so I'd like it to return true. I'd like to return false for any line that doesn't exist in the other file. The order of the values in each csv line is also important.
So far I have:
$input_file1="home/file1";
open(DAT1, $input_file1) || print "Could not open file1!";
@raw_data1=<DAT1>;
close(DAT1);
$input_file2="home/file2";
open(DAT2, $input_file2) || print "Could not open file2!";
@raw_data2=<DAT2>;
close(DAT2);
foreach $line (@raw_data1)
{
chop($line);
($v1,$v2,$v3,$v4)=split(/,/,$line);
if ($v1 ......
It's at this point that I get stuck. I've seen plenty of examples that compare just one value from each array but I want to make sure that all 4 of my comma seperated values exist in the other array in exactly the same order.
Any ideas?
Many thanks in advance.
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XZDIFF(1) XZ Utils XZDIFF(1)
NAME
xzcmp, xzdiff, lzcmp, lzdiff - compare compressed files
SYNOPSIS
xzcmp [cmp_options] file1 [file2]
xzdiff [diff_options] file1 [file2]
lzcmp [cmp_options] file1 [file2]
lzdiff [diff_options] file1 [file2]
DESCRIPTION
xzcmp and xdiff invoke cmp(1) or diff(1) on files compressed with xz(1), lzma(1), gzip(1), or bzip2(1). All options specified are passed
directly to cmp or diff. If only one file is specified, then the files compared are file1 (which must have a suffix of a supported com-
pression format) and file1 from which the compression format suffix has been stripped. If two files are specified, then they are uncom-
pressed if necessary and fed to cmp(1) or diff(1). The exit status from cmp or diff is preserved.
The names lzcmp and lzdiff are provided for backward compatibility with LZMA Utils.
SEE ALSO
cmp(1), diff(1), xz(1), gzip(1), bzip2(1), zdiff(1)
BUGS
Messages from the cmp(1) or diff(1) programs refer to temporary filenames instead of those specified.
Tukaani 2009-07-05 XZDIFF(1)