Dear Monks,

I am a newbie in perl, and have problem with my script as it skips my first input line when I'm using while. I am not sure how to fix it as I have looked up some examples, but still couldn't solve the problem. Here is the code, 

#! /usr/bin/perl

$file_input = "input";

open(IN, $file_input) || die "can't open $file_input : $!\n";
while(<IN>)
{
        $line =$_;
        if($line =~ /^(.*) (\d+)$/)
        {
                $data[$#data ++ ] = $1;
        }

}
close(IN);

$file_output = "output";
open(OUT, ">".$file_output) || die "can't open $file_output : $!\n";
for($i = 0; $i <= $#data; $i ++)
{
        print OUT $data[$i]. "\n";
}
close(OUT);

[download]
Here is the example of my input file. Using the perl script that I wrote, I basically want to remove the second column of the input file. 
47 58
320 52
410 59
1 200
42 58

[download]
and when I run perl script, the first line dissapears. Hope you can help. Thank you in advance.

In reply to using while, first line was skipped by rendus

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