From: Daniel Berger <djberg96@...>
Date: 2010-04-14T07:56:12+09:00
Subject: Re: how to delete the first two characters of each row?



On Apr 13, 11:26 am, Tony Arcieri <tony.arci...@medioh.com> wrote:
> Another option, utilizing Ruby's mutable strings:
>
> while line = io.gets
>   line.slice!(0, 2)
>   io1.write line
> end

If you want to avoid temporary files:

# Backup your file first, just in case, for testing purposes.

require 'mmap'
m = Mmap.new('mtp.txt', 'rw')
m.gsub!(/^..(.*)/, '\1')
m.each{ |line| puts line }
m.unmap

Regards,

Dan