From: Robert Klemme <bob.news@...>
Date: 2004-10-07T22:59:47+09:00
Subject: Re: Index of multiple similar strings


"Milo Thurston" <nospam@linacreschoolofdefence.org> schrieb im Newsbeitrag
news:ck3grg$8bv$1@news.ox.ac.uk...
> ts <decoux@moulon.inra.fr> wrote:
> > R> ??? Care to explain?
> >  You create a String object for each call, you don't have this problem
with
> >  $~.begin(0)
>
> That would explain it. Some of the strings I'm looking at are several MB
> in size. I've been writing out the data to disk and flushing stdout, but
> $` seemed to leave each complete sequence in memory, causing it to run
> out rather rapidly.

Yes, that's the reason.  I haven't though about this, but as you can see
each reference to $` creates a new string instance:

15:55:29 [robert]: ruby -e '"f".scan(/./) { 5.times{ puts $`.id } }'
134690392
134690368
134690344
134690320
134690296
15:55:58 [robert]:

Kind regards

    robert