From: Peter Bailey <pbailey@...>
Date: 2006-11-08T03:41:57+09:00
Subject: Re: Why am I getting this string error?

...
20   Dir.glob("*.ps").each do |psfile|
21    $filetime = File.ctime(psfile)
22    $filetime = $filetime.to_s.gsub!(/ -.*$/, "")
23    file_contents = File.read(psfile)
24    file_contents.scan(/\%\%Pages: (\d{1,5})[ ]+\n/) do
25    totalpages = $1
26      if (totalpages.to_i % 2) !=0 then
27      totalpages = totalpages.to_i + 1
28      file_contents. << "\%\%Blank page for Asura.\n\%\%Page:
29      #{totalpages.to_i}\nshowpage\n"
30      File.open(psfile, "w") { |f| f.print file_contents }
31      FileUtils.touch(psfile)
32      end
...

  You're modifying file_contents during scan, so scan gets confused.
from what I see, you'd better use gsub! with a block, since, if I
understood your point, you are basically inserting text where you detect
something.

	Vince

Thanks, Vince. I see what you mean, and, I did change it to use a gsub!. 
I've always thought of gsub as a changer for little things, not huge 
files like this, but, it works fine. Thanks again.

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