From: Gennady Bystritsky <Gennady.Bystritsky@...>
Date: 2006-02-08T05:48:06+09:00
Subject: Re: Grep via Ruby

Sorry if it was mentioned already (and not to discourage the OP, of
course), but what's wrong with "grep -i"? Isn't it case-insensitive
enough? ;-)

Gennady. 

> -----Original Message-----
> From: William James [mailto:w_a_x_man@yahoo.com] 
> Sent: Tuesday, February 07, 2006 12:43
> To: ruby-talk ML
> Subject: Re: Grep via Ruby
> 
> ralf wrote:
> > Hi,
> > I'd like to have a "grep" with case-insensitive match. normal grep 
> > does not have this functionality (afaik), but ruby does. So 
> this is, 
> > what i
> > wrote:
> >
> > cat rgrep:
> > #!/usr/bin/env ruby
> > # Grep with full regexp-functionality via ruby
> >
> > if ARGV.shift == "-p"
> >   pattern = Regexp.new(ARGV.shift)
> > else
> >   puts "Please give me a pattern with the '-p' option"
> >   exit
> > end
> > ARGV.each do |filename|
> >   File.open(filename) do |file|
> >     file.each do |line|
> >       puts "#{filename} #{file.lineno.to_s}: #{line}" if
> > pattern.match(line)
> >     end
> >   end
> > end
> >
> > Using it via: rgrep -p '/delete /i' *.php does not match 
> anything, but 
> > this #!/usr/bin/env ruby # Grep with full regexp-functionality via 
> > ruby
> >
> > if ARGV.shift == "-p"
> >   pattern = Regexp.new(ARGV.shift)
> > else
> >   puts "Please give me a pattern with the '-p' option"
> >   exit
> > end
> > ARGV.each do |filename|
> >   File.open(filename) do |file|
> >     file.each do |line|
> >       puts "#{filename} #{file.lineno.to_s}: #{line}" if /delete
> > /i.match(line)
> >     end
> >   end
> > end
> >
> > DOES match. Does anyone see the bug? Maybe this can be done a lot 
> > easier by using ARGF??
> 
> 
> if ARGV.shift == "-p"
>   pattern = Regexp.new(ARGV.shift,Regexp::IGNORECASE)
> else
>   puts "Please give me a pattern with the '-p' option"
>   exit
> end
> 
> puts "#{$FILENAME} #{$.}: #{$_}"  if $_ =~ pattern  while gets
> 
> 
>