Does this seem sensible? No, it does not.

I think you want to select particular lines of interest from the input for further processing? This simple code does that.

#!/usr/bin/perl
use strict;
use warnings;

use Inline::Files;  # Just for this Demo
                    # so that this is a single runnable file

# Monk node_id=11106111

my %nameValid;

# initialize Name Hash...
# Name the hash by what the Value Means,
# not by what the hash key means

while (my $name = <LISTOFNAMES>)
{
    chomp $name;           # shorter idioms exist
    $nameValid{$name}=1;   # but this is just fine
}

while (my $line = <DATA>)
{
     chomp $line;
     my ($name,$data) = split ",",$line,2;
     
     if ( exists $nameValid{$name} )
     {
         # name is in "list" do something
         # I have no idea what to do?
         # so I just print that line
         
         print "$name => $data\n";
     }
}  


# prints the one line of interest:
# 122854/1 => 284224,284277,chrX,255,+,284224,284277,255,0,0,1,53,0

     

__LISTOFNAMES__
1000567/1
1000567/2
122854/1
1000574/1
1000574/2

__DATA__
1083978/2,284224,284292,chrX,255,+,284224,284292,255,0,0,1,68,0
122854/1,284224,284277,chrX,255,+,284224,284277,255,0,0,1,53,0
641613/1,284224,284290,chrX,255,+,284224,284290,255,0,0,1,66,0

[download]
Please see Wiki Article on regex (Regular Expression).
You may be able to use the -f option on grep to do what you want?

In reply to Re^3: Extacting lines where one column matches a name from a list of names by Marshall
in thread Extacting lines where one column matches a name from a list of names by mr_clean

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