From: gabriele renzi <surrender_it@...1.vip.ukl.yahoo.com>
Date: 2004-05-04T15:54:01+09:00
Subject: Re: IO::write

il Tue, 04 May 2004 00:05:05 -0500, Charles Comstock
<cc1@cec.wustl.edu> ha scritto::

>Why is there only an IO::read, and no equivalent IO::write that takes a 
>filename, a string to write, and an optional offset in the file to start 
>writing at?  Or better yet an IO::write(filename[,offset])= string 

Agreed, that would be cool. 
There is an implementation on the extensions page at rubyforge:

write(path, data)

Writes the given data to the given path and closes the file. This is
done in binary mode, complementing IO.read in standard Ruby.

[Source]

# File extensions/io.rb, line 24
    def write(path, data)
      File.open(path, "wb") do |file|
        return file.write(data)
      end
    end

but as you see this misses the offset argument, that may be needed.