in reply to length of 1's

Is that your real program? You never open INFILE, so you never read anything from it, so you never add anything to @newseq. Use use strict; and use warnings;. You would have gotten 

Name "main::INFILE" used only once: possible typo at a.pl line 18.
readline() on unopened filehandle INFILE at a.pl line 18.

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Re^2: length of 1's
by coldy (Scribe) on Apr 27, 2009 at 04:51 UTC
    use warnings results in this warning;

    Use of uninitialized value in numeric eq (==) at bin2runs.pl line 32

    Without any better ideas, I tried changing the ==0 to ==$zero, and initializing $zero earlier (my $zero =0), to no success. Other than the warnings the script works.

[reply]
      Not for the code you gave. Line 32 is a blank line. I can't speculate about code I know nothing about.
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        Here is all my code, warning on first if line. 
        !/usr/bin/perl -w


use strict;


open(INFILE,"<$ARGV[0]") or die "can't open $ARGV[0]";
open(OUTFILE,">$ARGV[1]") or die "can't open $ARGV[1]";


my @result   = split '', 'abcdefghijklmno';
my @arg1   = (0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15);
my %rules;


# Build the rules hash
    $rules{$arg1[$_]} = $result[$_] for 0 .. $#result;

my $run = 0;
my @bin = ();
my @newseq = ();

while ( <INFILE> ) {
   chomp;
   @bin= split(//, $_);
   for my $i (0..$#bin) {
      if ($bin[$i]==0){
         $run=0;
         push @newseq,$run;
      }
      elsif ($bin[$i]==1 && $bin[$i+1]==0||$bin[$i+1]==0)){
         $run++;
         push @newseq, $run;
      }
      else {
         $run++;
      }
   }
}
my $m = $#newseq+1;

 for (1 .. $m) {
       if ( $_ % 80 != 0){ print OUTFILE "$rules{$newseq[$_-1]}"}
          else{  print OUTFILE "$rules{$newseq[$_-1]}\n"; }
}

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[d/l]
        32 is this line ( Ive not posted all the code as most is not relevant) if ($bin$i==0){
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