Given this question, asked anonymously the day before, contains test data with the identical first two lines namely: 

nick 5
nick 10

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I'm guessing you are the same anonymonk. If so, it would've been good to mention that.

Further to hv's excellent suggestion of using s{\s+$}{} (that presumably fixed your problem), you might consider writing a standalone program that does nothing more than verify that your input data files are well-formed.

Though you didn't rigorously define the format of your input files in either of your questions, I'm guessing that to be well-formed, each line in your data files must match: 

^[a-z]+\t\d+$

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Is that right? If so, to avoid future pain, you might consider writing a simple data validation program, for example: 

use strict;
use warnings;

my $fname = shift or die "usage: $0 file\n";
open( my $fh, '<', $fname ) or die "error: open '$fname': $!";
my $lcnt = 0;
my $line;
while ( defined($line = <$fh>) ) {
   ++$lcnt;
   chomp $line;
   $line =~ /^\s+/ and die "error: line $. contains leading  whitespac
+e\n";
   $line =~ /\s+$/ and die "error: line $. contains trailing whitespac
+e\n";
   length($line) or die "error: line $. is empty\n";
   $line =~ /^[a-z]+\t\d+$/ or die "error: line $. ($line) does not ma
+tch word TAB number\n";
}
close $fh;
warn "file '$fname': $lcnt lines, no data format errors detected\n";

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Running this program on Linux against a CRLF terminated Windows file produces: 

error: line 1 contains trailing whitespace

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Obviously, you could make the crude data validation program above more elaborate. Alternatively, you might add more rigorous file format checks to your original program.

In reply to Re: Why is my code producing weird output? by eyepopslikeamosquito
in thread Why is my code producing weird output? by Anonymous Monk

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