From: Robert Klemme <shortcutter@...>
Date: 2011-10-22T06:25:55+09:00
Subject: Re: Binary parsing

On Fri, Oct 21, 2011 at 11:02 PM, Stuart C. <stuart_clarke86@yahoo.com> wrote:
> I have a quick query relating to parsing binary data. In python you are
> able to specify in your code
>
> DataA is bytes 10 to 35
> DataB is bytes 36 to 40
> etc etc
>
> What is the equivalent in Ruby? I essentially will be reading in binary
> data and reading it in specific chunks as data in a range of bytes
> equates to one things, other bytes are another. Generally the data is
> consistently structured.

There is String#unpack
http://www.ruby-doc.org/core-1.9.2/String.html#method-i-unpack

and Array#pack for the other direction
http://www.ruby-doc.org/core-1.9.2/Array.html#method-i-pack

And then there are gems and libraries, for example
http://raa.ruby-lang.org/project/bindata/
http://raa.ruby-lang.org/project/bit-struct/
http://raa.ruby-lang.org/project/packstruct/

Found via
http://raa.ruby-lang.org/search.rhtml?search=binary

Kind regards

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/