vighneshmufc has asked for the wisdom of the Perl Monks concerning the following question:
Given below is a perl script which compares one column from one file and checks with a key if it exists in another file and exists in file2.
SO basically These are the files
File1
L| D
L| C
L| C
File2
AE|A|D||
A|A|P| |
A|A|P| |
A|A|P| |
So if i pass Col2 from file1 as parameter and Col3 from file2 as second the output should be
AE|A|D||
Since this contains the column2 value from file1 in its column3
Now i want it to be able to compare with N number of columns like file 1 having more than 1 columns. What modifications are to be done in this ? The need is to generalize the script and make it a compare utility. Kindly guideuse strict; use warnings; use Data::Dumper; my ($file1 ,$file2,$file3)= @ARGV; open(my $fh, '>', $file3) or die $!; #reading file1 into a hash my %hash; my @fields; open( my $fh1, '<', $file1 ) or die $!; while ( my $line = <$fh1> ) { chomp $line; next if $line =~ /^\s*$/; $line =~ s/^\s+|\s+$//g; $hash{$line} = 1; } #print Dumper(\%hash); close $fh1; open( my ($fh2), $file2 ) or die $!; while ( my $row = <$fh2> ) { chomp $row; #print "$row\n"; next if $row =~ /^\s*$/; $row =~ s/^\s+|\s+$//g; my (@fields) = split( /\|/, $row ); # print "$fields[0]\n "; if ( exists $hash{ $fields[0] } ) { print $fh "$row\n"; } } close $fh; close $fh2;
SO basically These are the files
File1
L| D
L| C
L| C
File2
AE|A|D||
A|A|P| |
A|A|P| |
A|A|P| |
So if i pass Col2 from file1 as parameter and Col3 from file2 as second the output should be
AE|A|D||
Since this contains the column2 value from file1 in its column3
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Replies are listed 'Best First'. | |
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Re: Comparision Utility PERL
by hippo (Bishop) on Feb 09, 2018 at 09:02 UTC | |
by vighneshmufc (Acolyte) on Feb 09, 2018 at 09:08 UTC | |
by hippo (Bishop) on Feb 09, 2018 at 09:16 UTC | |
by vighneshmufc (Acolyte) on Feb 09, 2018 at 09:56 UTC | |
by hippo (Bishop) on Feb 09, 2018 at 10:03 UTC | |
| |
by vighneshmufc (Acolyte) on Feb 09, 2018 at 09:33 UTC | |
by hippo (Bishop) on Feb 09, 2018 at 09:42 UTC | |
Re: Comparision Utility PERL
by Marshall (Canon) on Feb 09, 2018 at 10:32 UTC | |
by vighneshmufc (Acolyte) on Feb 09, 2018 at 10:41 UTC | |
by vighneshmufc (Acolyte) on Feb 09, 2018 at 10:44 UTC | |
by Marshall (Canon) on Feb 09, 2018 at 11:30 UTC | |
by vighneshmufc (Acolyte) on Feb 09, 2018 at 11:51 UTC | |
by poj (Abbot) on Feb 09, 2018 at 12:37 UTC | |
Re: Comparision Utility PERL
by tybalt89 (Monsignor) on Feb 09, 2018 at 23:00 UTC |
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