From: Naga Vijay <lists@...>
Date: 2012-08-29T10:41:40+09:00
Subject: Regex Non Greedy Match

Hello,

I am trying to get a non-greedy match, but am unable to do so.  What may
I be doing wrong?  Please help.


======
Code:
======

puts

str1 = "Hi, @[Subject:13|My_Subject]"
str2 = "Hi, @[Subject:13|My_Subject], and @[Subject:45|Your_Subject]"

re = /@\[Subject:\d+\|(.*)\]/

# works fine, grabs the matching pattern
p " ... this works fine ..."
p str1.scan(re).flatten

# why does this not grab the two patterns as an array?
# how to avoid the greedy match?
# that is, how to make it a non-greedy match?
puts
p " ... this does not work fine; how to avoid the greedy match? ..."
p str2.scan(re).flatten

puts


========
Output:
========

" ... this works fine ..."
["My_Subject"]

" ... this does not work fine; how to avoid the greedy match? ..."
["My_Subject], and @[Subject:45|Your_Subject"]


Thanks very much!
Naga Vijay

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