#!/usr/local/bin/perl

print "hello\n";

open(FILE1, "<file1.txt") or die "cannot open: $!\n";

open(OUTFO1, ">outfile3.txt") or die "cannot open: $!\n";

use strict;
use warnings;

my @data1 = <FILE1>;
print "hello\n";
print scalar(@data1);

my @data2 = <FILE2>;
print "hello\n";

my @ra = map{(split)[1]}split/\t/, @data1;
print "hello\n";

print scalar(@ra);  #ERROR: LENGTH OF @ra SHOWING 0
print OUTFO1 "@ra"; #ERROR: OUTPUT FILE IS CREATED BUT IS EMPTY

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Hello, the above is my code. My input file is a multicolumn tab delimited data file. I want to extract first column and output it in another file.The output file is generated but is empty. Please help me out to find my flaws. Thank you.

In reply to EMPTY OUTPUT FILE GENERATED by perlneedhelp2012

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