I used the filehandle DATA as a convenient way to include some test lines in a Simple, Self Contained Example. You can either do as markong suggested and populate an array with your output

my @output = `bpdbjobs`;
#while (<DATA>){
for (@output) {
  # process lines
}

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or if you have the output in a text file, open a filehandle to that

my $filename  = 'output.txt';
open my $fh,'<',$filename or die "Could not open $filename : $!";
while (<$fh>){
  # process lines
}

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or you may be able to pipe the output directly from your program. see Calling External Commands More Safely

open my $fh, '-|', 'bpdbjobs' or die $!;
while (<$fh>){
  # process lines
}
close $fh or die $! ? $! : $?;

[download]
Updated ; last example corrected backticks to single quote
poj

In reply to Re^5: Turning regex capture group variables into arrays, then counting the number of objects in the array by poj
in thread Turning regex capture group variables into arrays, then counting the number of objects in the array by Djay

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