From: James Gray <james@...>
Date: 2008-12-21T04:43:32+09:00
Subject: [ruby-core:20728] Re: Working with binary strings in Ruby 1.9?

On Dec 20, 2008, at 12:49 PM, Hadmut Danisch wrote:

> The code I am working on is parsing files with binary content (such as
> pictures, machine code, etc.). With 1.8, I could easily use
>
>    * File.open{|f| f.read} to read the contents,

In 1.9 use:

   File.binread(�)

>    * data[10] to pick the byte code at a given position efficiently

   data.getbyte(10)

>    * data[10..20] to extract some bytes efficiently

   data.bytes.to_a[10..20]

>    * and use index and rindex to find bytes.

   data.bytes.to_a.index/rindex

Hope that helps.

James Edward Gray II