From: Paul Smith <paul@...>
Date: 2009-12-20T19:48:32+09:00
Subject: Re: Regex question

On Sun, Dec 20, 2009 at 10:05 AM, W. James <w_a_x_man@yahoo.com> wrote:
> Katz Bo wrote:
>
>> [code]
>> irb(main):113:0> /l{2}x/ =~ 'llx'
>> => 0
>> irb(main):109:0> /(lo){2}/ =~ 'lolo'
>> => 0
>> irb(main):110:0> /(lo){2}x/ =~ 'lolox'
>> => nil
>> irb(main):111:0> /(?:lo){2}x/ =~ 'lolox'
>> => 0
>> [/code]
>>
>> Note the third command returned nil but the fourth worked, any ideas?

Seems like a bug.

irb(main):110:0> /(lo){2,3}x/ =~ 'lolox'
irb(main):110:0> /(lo){1,2}x/ =~ 'lolox'
irb(main):110:0> /(lo){2,}x/ =~ 'lolox'
irb(main):110:0> /(lo){,2}x/ =~ 'lolox'

all work for me on ruby 1.9.1p243 (2009-07-16 revision 24175) [i386-mingw32]

It's just {2} that doesn't work.

-- 
Paul Smith
http://www.nomadicfun.co.uk

paul@pollyandpaul.co.uk