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Regular Exp & Matching Question

Posted on 2002-04-28
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Last Modified: 2010-03-05
Everytime I use perl i some how wind up needing to match the smallest occurence of a substr within a string.

$a="< a hhref='http://www.yahoo.com' name=a>Yahoo!</a><a href ='link.com'>Link</a>";
if ($a=~/name=a>(.*)<\/a>/)
{
   print $1;
}

The result I want is "Yahoo!" but what i actually get is "Yahoo!</a><a href ='link.com'>Link".  I realize the regular expression ".*" is the culprit but how do i tell perl to grab the "smallest" matching string and not the default largest matching string?  Is it simply replacing ".*" with "[^<]*" for my case or is there another method?
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Question by:barkin
1 Comment
 
LVL 25

Accepted Solution

by:
clockwatcher earned 50 total points
ID: 6975311
'?' will make the match non-greedy.

$a="< a hhref='http://www.yahoo.com' name=a>Yahoo!</a><a href ='link.com'>Link</a>";
if ($a=~/name=a>(.*?)<\/a>/)
{
  print $1;
}

See:

 perldoc -q greedy
0

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