From: Park Heesob <phasis68@...>
Date: 2007-10-26T00:03:44+09:00
Subject: Re: read write integer in binary into a file

Hi,
----- Original Message ----- 
From: "Vianney Lecroart" <acemtp@gmail.com>
Newsgroups: comp.lang.ruby
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
Sent: Thursday, October 25, 2007 11:36 PM
Subject: read write integer in binary into a file


> Hello,
> 
> I have some big files with lot of "unsigned int" (4 bytes) numbers and I
> want to read and write on these files.
> 
> Currently, I found this to write:
> 
> myfile << [mynum].pack("i")
> 
> and to read:
> 
> mynum = myfile.read(4).unpack("i").first
> 
> I wonder if there's not something faster/simpler to do that without the
> need to convert the number into an array into a string to finally
> serialize it.
> 
> Thank you.

How about Marshal?

 myfile << Marshal.dump(mynum)
 
and

 mynum = Marshal.load(myfile.read)
 
Regards,

Park Heesob