From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2010-11-19T22:33:42+09:00
Subject: Re: Multi-line regular expression match question

On Fri, Nov 19, 2010 at 1:42 PM, Guillermo Riojas
<guillermo.riojas@gmail.com> wrote:
> Hi,
>
> I have been trying to create a solid regular expression to match a
> possible multi-line expression without success. So after several hours i
> almost got there but not the point i would like, hoping somebody can
> point me in the right direction.
> Here is an example i am dealing with:
>
> 01xxxxxxxxxxxxxx
> |-:
> <20>ABCD
> <30>edfghi212
> -|
> |-:
> <20>EFGH
> <30>hjkli3232
> -|
> 89xxxxxxxxxxxxx
>
> I need to match anything that is enclosed in between "|-:" and "-|"
> So far i've got "/^\{\|-:$.*^-\|$/m" , this one is greedy, returning the
> complete set, instead of each match, i just haven't figure out how to
> make it reluctant enough to return one by one.
>
> The returned matches expected must be something like this:
>
> 1:
> |-:
> <20>ABCD
> <30>edfghi212
> -|
>
> 2:
> |-:
> <20>EFGH
> <30>hjkli3232
> -|
>
> Currently is returning:
> 1:
>
> |-:
> <20>ABCD
> <30>edfghi212
> -|
> |-:
> <20>EFGH
> <30>hjkli3232
> -|
>
>
> Any suggestion is greatly appreciated.
> And finally, any good regular expressions book ?? =)

irb(main):018:0> s =<<EOF
irb(main):019:0" 01xxxxxxxxxxxxxx
irb(main):020:0" |-:
irb(main):021:0" <20>ABCD
irb(main):022:0" <30>edfghi212
irb(main):023:0" -|
irb(main):024:0" |-:
irb(main):025:0" <20>EFGH
irb(main):026:0" <30>hjkli3232
irb(main):027:0" -|
irb(main):028:0" 89xxxxxxxxxxxxx
irb(main):029:0" EOF
=> "01xxxxxxxxxxxxxx\n|-:\n<20>ABCD\n<30>edfghi212\n-|\n|-:\n<20>EFGH\n<30>hjkli3232\n-|\n89xxxxxxxxxxxxx\n"
irb(main):036:0> s.scan(/(\|-:.*?-\|)/m)
=> [["|-:\n<20>ABCD\n<30>edfghi212\n-|"], ["|-:\n<20>EFGH\n<30>hjkli3232\n-|"]]

Jesus.