From: Ross Bamford <rossrt@...>
Date: 2006-10-13T01:33:11+09:00
Subject: Re: IO.readint ?

On Fri, 2006-10-13 at 00:35 +0900, Rolando Abarca wrote:
> Hi all,
> I'm parsing a binary file, and need to read an integer, 

Check out String#unpack:

(dta = File.read('ints.bin')).unpack('I' * (dta.length / 4))
# => [1234, 2345, 3456]

It has different type specifiers for endianness and so on. Also, if you
gotta crawl through the file, you can tell IO#read how many bytes you
want:

File.open('ints.bin') { |f| puts f.read(4).unpack('I') until f.eof? }
# 1234
# 2345
# 3456
# => nil

-- 
Ross Bamford - rosco@roscopeco.REMOVE.co.uk