From: Jamis Buck <jamis_buck@...>
Date: 2004-12-13T00:20:11+09:00
Subject: Re: Find every location of "th" in string.

On 00:10 Mon 13 Dec     , Glenn Parker wrote:
> Robert Klemme wrote:
> >>>"the thin man thinks".scan( /th/ ) { puts $`.length }
> >0
> >4
> >13
> >=> "the thin man thinks"
> 
> scan doesn't really do that well.
> 
> "banana".scan(/ana/) { puts $`.length }
> 1
> => "banana"
> 
> The second overlapping occurence of "ana" is missed.

Well, if you don't mind using a little regexp magic:

  >"banana".scan(/a(?=na)/) { puts $`.length }
  1
  3
  => "banana"

- Jamis

-- 
Jamis Buck
jgb3@email.byu.edu
http://www.jamisbuck.org/jamis