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From: Nathan on 9 Apr 2010 04:40
> "tttttattttt".match(/ttt(?=a)/) # http://rubular.com/r/21Zo6JP09f
=> ["ttt"]
> "tttttattttt".match(/(?=a)ttt/) # http://rubular.com/r/d1VSUwwZUu
=> nil

Why? And how can I get this effect?

From: Robert Klemme on 9 Apr 2010 06:08
On 04/09/2010 10:40 AM, Nathan wrote:
>> "tttttattttt".match(/ttt(?=a)/) # http://rubular.com/r/21Zo6JP09f
> => ["ttt"]
>> "tttttattttt".match(/(?=a)ttt/) # http://rubular.com/r/d1VSUwwZUu
> => nil
>
> Why? And how can I get this effect?

It seems you have just demonstrated how to get the effect you described.

For more info:

http://www.geocities.jp/kosako3/oniguruma/doc/RE.txt

Note: you need Ruby 1.9.

Kind regards

robert

--
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/
From: Nathan on 9 Apr 2010 08:13
Ah (?<=a)ttt is what I was after. Thanks for the link.

On Apr 9, 11:10 am, Robert Klemme <shortcut...(a)googlemail.com> wrote:
> On 04/09/2010 10:40 AM, Nathan wrote:
>
> >> "tttttattttt".match(/ttt(?=a)/) #http://rubular.com/r/21Zo6JP09f
> > => ["ttt"]
> >> "tttttattttt".match(/(?=a)ttt/) #http://rubular.com/r/d1VSUwwZUu
> > => nil
>
> > Why? And how can I get this effect?
>
> It seems you have just demonstrated how to get the effect you described.
>
> For more info:
>
> http://www.geocities.jp/kosako3/oniguruma/doc/RE.txt
>
> Note: you need Ruby 1.9.
>
> Kind regards
>
>         robert
>
> --
> remember.guy do |as, often| as.you_can - without endhttp://blog.rubybestpractices.com/

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