From: daz <dooby@...10.karoo.co.uk>
Date: 2004-03-02T13:49:45+09:00
Subject: Re: binary data


"quillion" wrote:
> Alwin Blok wrote:
> > Hello!
> >
> > I'm new to ruby. I'm learning it and it seems to be a very nice language.
> >
> > However, I do have a question about binary handling. I'd like to write
> > binary data directly to a file.
> > I found that I can use myfile.write(["1001010100"].pack("B10")), but i'd
> > like to be able to write, for example 0b1001010100 directly to a file.
> > How do I do that, or else, are ther other useful ways to write binary
> > data to a file
> >
> > Thanks in advance
> >
> > Alwin
> >
> very old coding style, may be of interest
>
>      begin
>         out_file = your data
>         f = File.new("file name", "w")
>       end
>
>       begin
>         out_file.each{ |ch|
>           f.binmode.putc(ch)
>         }
>       ensure
>         f.close
>       end
>
>
>
> neil

Like Neil said ...


File.open('tbinary.dat', 'wb') do |fb|
  fb.putc 0b11011011
  fb.putc 255
  fb.putc 0xAB
  fb.putc 0x42
end

## See what happened ...
File.open('tbinary.dat', 'rb') do |fb|
  bd = fb.read
  puts bd.unpack('H*')
end


#-> dbffab42


daz