From: "Ian M. Asaff" <ian.asaff@...>
Date: 2011-07-15T09:54:07+09:00
Subject: Re: Is there a more efficient way to remove data from a string?

i'd use a regex and the string split method:

ruby-1.9.2-p180 :004 > line = "abcXXdef"
 => "abcXXdef"
ruby-1.9.2-p180 :005 > line.split(/XX/).first
 => "abc"

On Thu, Jul 14, 2011 at 8:37 PM, Eddie Catflap <catflaporama@gmail.com> wrote:
> Hi
>
> I have a regex as follows
>
> REG1=Regexp.new=('dodgydata')
>
> Basically, I need to read a file in line by line, and on each line
> that's a match for my regex, remove everything from the point of the
> regex to the end of that line. Is there a more efficient way to do it
> than what I have at the moment? I have some HUGE files to process, and
> many more regex matches to capture.. :-/
>
> ARGF.each_line do [L]
>
> if L.index(REG1)
>   a=L.index(REG1)
>   b=L.length
>   L.slice!(a..b)
>   L << "\n"   # Add a newline back to the end of the line
> end
>
> print L
>
> end
>
> (As you can see I'm no ruby expert!). I'd like to be able to make this
> more efficient, just doesn't seem a very Ruby way to do things.. All
> help gratefully accepted!
>
> Regards
>
> Eddie
>
>