From: Rafael <mayoral.rafael@...>
Date: 2008-07-02T05:32:09+09:00
Subject: Problem with unpack

Hi,

I'm trying to read a binary file and would want to find within the
file a particular substring. I have done the following

file = File.open("testFile","rb")
str = String.new
file.read(512, str)

puts (str.length).to_s    # how many bytes have I read?

strhex = str.unpack("H*")
puts strhex    # just show me the string to check

if (strhex.include?("020")) == true then
	puts "The tag was found"
else
	puts "The tag was not found"
end

The tag is not found although I can see (and I know) that the
substring 020 is in there.

I have tried to find the problem and I realized that the length of
strhex is one
strhex.length # -> 1

This is certainly the problem. But why is the length only one? Can
anyone help?
I am also aware that this code is probably not the best way of solving
my problem. I'm still learning

Thanks


Cheers


Rafael