From: Wes Gamble <weyus@...>
Date: 2006-03-22T08:28:01+09:00
Subject: Re: Newbie:  How do I get hex formatted bytes from a file?

Answer:

puts "Magic number is: #{magic_number.unpack('H*')}"

Thanks for all the help.

Argh!

I sure wish there were a get_bytes() method on the File and/or IO 
objects.

:)

WG

Wes Gamble wrote:
> Why do I have to read my bytes into a string and then convert them back?
> 
> Is there any way to read an array of bytes from my file?
> 
> WG
> 
> Daniel Harple wrote:
>> On Mar 21, 2006, at 11:43 PM, Wes Gamble wrote:
>> 
>>> Daniel,
>>>
>>> Not to be obtuse, but what is the # sign for in the specification?
>>>
>>> And what is the mod 100 -> 0x64 business about?
>>>
>>> wg
>> 
>> Sorry, I misread your question. What you need is String#unpack. Do a
>> 'ri String#upack'. String#% is the format method. It's function is
>> the same as printf. See Kernel#sprintf for a list of format options
>> (including #).
>> 
>> -- Daniel


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