From: Rick DeNatale <rick.denatale@...>
Date: 2007-06-18T04:36:19+09:00
Subject: Re: wite an integer to file as binary

On 6/15/07, John Joyce <dangerwillrobinsondanger@gmail.com> wrote:
> This one is always a stumper.
> use the method to_s(2)
> 5.to_s(2)
> Converts 5 to base 2 (binary) as a string.
> This is fine for output to a file!

Except that the OP was looking to write the integer as 4 binary bytes.
Array#pack is the way to go.

> Alternatively, if you're looking to set binary write mode for Windows
> (versus text mode. this is windows only)
> there is binmode

That doesn't afffect how data is written, it keeps windows from
processing control characters and doing things like prematurely giving
an end-of-file if the data contains a ctrl-D character.


-- 
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/