Re^4: Comparision Utility PERL

i need to run this file as perl filename.pl file1 file2 file3 Col2 col3
i am very new to this . Also i reduced the sample.
i am not quite able to grasp what you meant because i need to use command line arguments

Comment on Re^4: Comparision Utility PERL

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Re^5: Comparision Utility PERL by hippo (Archbishop) on Feb 09, 2018 at 09:42 UTC
If you want the user to specify specific column numbers then you can pass that as an array in the range of the for loop instead of using all the columns. eg: `my @cols = (0, 2); # You would actually get these from @ARGV but it do +esn't matter here # ... for my $fieldnum (@cols) { if ( exists $hash{ $fields[$fieldnum] } ) { print $fh "$row\n"; next; } }` [download] I'm going to ignore any mention of "file3" since this is the first time you have brought it up. See also How do I change/delete my post? lest your changes make no sense.	[reply] [d/l]

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Re^5: Comparision Utility PERL
by hippo (Archbishop) on Feb 09, 2018 at 09:42 UTC

If you want the user to specify specific column numbers then you can pass that as an array in the range of the for loop instead of using all the columns. eg:

my @cols = (0, 2); # You would actually get these from @ARGV but it do
+esn't matter here

# ...

    for my $fieldnum (@cols) {
        if ( exists $hash{ $fields[$fieldnum] } ) {
            print $fh "$row\n";
            next;
        }
    }
[download]

I'm going to ignore any mention of "file3" since this is the first time you have brought it up. See also How do I change/delete my post? lest your changes make no sense.

[reply]
[d/l]