From: Timothy Hunter <TimHunter@...>
Date: 2007-03-28T09:13:23+09:00
Subject: Re: String Intersection. A better way

Daniel N wrote:
> Hi all,
>
> I have an issue with strings.  I want the intesection of two strings 
> but I'm
> not sure how to go about it.  I have two cases.
>
> Case 1:
> String 1 has the tail end intersecting with the start of string 2..  eg:
>
> String 1: The quick brown fox jumped over the lazy dog.
> String 2: fox jumped over the lazy dog.  And in other news bla bla bla
>
> The problem is I don't know how much is intersecting.
> What I've done is to take string 1 and say psudo code
>
> until match found
>   string2 =~ /^(value of string1)/
>   if match found set flag
>   else delete first char of string1
> loop again
>
> What is a better way to do this?
>
> Case 2:
>
> The start of String1 intersects with the end of string2  eg:
>
> String1:   And here we are with another string.
> String2:   bla bla bla.   And here we are
>
> I don't really know about this one yet...  I haven't gotten to it.
>
> Can anyone pls suggest what I might do?
>
> Thanx
> Daniel
>
Take a look at the MatchData class, particularly the #begin and #offset 
methods.