From: ahoward <ahoward@...>
Date: 2003-05-06T06:42:01+09:00
Subject: Re: [Q] Binary data

On Tue, 6 May 2003, Daniel Carrera wrote:

> Hi,
>
> Is it possible to store and manipulate binary data in Ruby?
> As in the actual sequence of 1's and 0's.  I'm curious in the
> data-compression problem, but to be able to do any compression on a Ruby
> string I need to be able to manipulate data at the bit level.
>
> Does anyone know how this can be done?

----CUT----
#!/usr/bin/env ruby

# http://rwiki.moonwolf.com/rw-cgi.cgi?cmd=view;name=BitSet
# http://raa.ruby-lang.org/list.rhtml?name=bitset
require 'bitset'

class BitSet; def []= i, b; self.set i, b; end; end

b = BitSet.new 8
b[1], b[3], b[5] = 1, 1, 1

p b                      # >> 01010100
p eval("#{b}b0".reverse) # >> 42
----CUT----

-a


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