But your code above loops through the entire file of the  RAW input handle (assuming the syntax error is fixed), processing and printing every line. (BTW: Nothing is ever written to the  OUT handle.)

If you want to process only the first line of RAW, maybe something like (untested): 

my $first_line = <RAW>;
close RAW or die "closing raw input: $!";

chomp $first_line;
my $first_field = split m{ , \s* }xms, $first_line;
print "$first_field\n";

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Give a man a fish:  <%-{-{-{-<

In reply to Re^5: How do I select first string of a two dimensional array to compare to other values? by AnomalousMonk
in thread How do I select first string of a two dimensional array to compare to other values? by joi1369

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