From: ts <decoux@...>
Date: 2001-03-03T02:59:59+09:00
Subject: [ruby-talk:11911] Re: rewrite with Ruby

>>>>> "H" == Hugh Sasse Staff Elec Eng <hgs@dmu.ac.uk> writes:

H> How would one make it really generic?  Ruby has -i as well, so how can one
H> get at it to do:
H>  	ruby -i.bak -p -e 'gsub(/^#define DEBUG/, "#undef DEBUG/") config.h
H> in an elegant way, within a program?

 First you copy the file, then you write :

pigeon% cat aa
123
abc
pigeon% 

pigeon% cat b.rb
#!/usr/bin/ruby
require "mmap"
m = Mmap.new("aa", "rw")
m.gsub!(/./, '(\&)')
pigeon% 

pigeon% b.rb
pigeon% cat aa
(1)(2)(3)
(a)(b)(c)
pigeon% 

 it's really experimental actually and it define only bang methods (gsub()
 is not defined) to don't return a string too big.

 it's also slow, well it's best to not modify the file :-)


Guy Decoux