This is great - thanks for explaining, helps a lot.
the original expression I posted works this tool : http://gskinner.com/RegExr
I would love to know what magic Grant is using to get it working in his RegExp
utility.
Thank you Anthony.
On 11 Mar 2011, at 23:42, Anthony Pace wrote:
> Hi Karim and Ktu,
>
> Below is an explanation of what appears to be going on in the given pattern:
>
> (?:\s*)
> is a greedy non-capturing group of whitespace
>
> (?<=[-|/])
> is looking behind the next section of the expression, (?<name>\w*),
> for, what is in this case, a character set; as well, it does so
> without including it in the result. In this case the character
> set could also be written without the |, resulting in [-/]
>
> (?<name>\w*)
> is looking for name>\w*, before the next expression [:|=]
> you may have wanted (?P<name>\w*)
>
> [:|=]
> is a character set : or =, but again does not need the |,
> and could be [:=] or something like (?::|=)
>
> ("((?<value>.*?)(?<!\\)")|(?<value>[\w]*))
> is what I think you may have wanted to be an alternation,
> and in another language it would have worked; however, not in AS3.
>
> Apparently in AS3 in order to distinguish the syntax from a
> lookbehind ?< you need to use the syntax ?P<desiredGroupName>
> when defining a named group; as well, it is due to the fact that,
> as far as I know, in AS3 you cannot use names of the same group
> even a logical OR alternation.
>
>
> On 3/11/2011 2:37 PM, Ktu wrote:
>> I just plugged it into RegExr<http://www.regexr.com> and I can't make sense
>> of it.
>>
>> Try using that tool to build it. It really helps
>>
>>
>> On Fri, Mar 11, 2011 at 5:56 AM, Karim Beyrouti<[email protected]> wrote:
>>
>>> Hello lovely list...I am trying to run a RegExp pattern on a String, and am
>>> not too sure why it's not working, and am not too sure why.
>>> Here is the code:
>>>
>>> var tStr : String = '/a:"value" -big="this" -test:123
>>> -test2=th_3'
>>> var r : RegExp = new RegExp(
>>> '(?:\s*)(?<=[-|/])(?<name>\w*)[:|=]("((?<value>.*?)(?<!\\)")|(?<value>[\w]*))');
>>> var result : Object = r.exec( str );
>>>
>>> result returns null... Maybe you can shed some light on what i am doing
>>> wrong here?
>>>
>>> Thanks...
>>>
>>>
>>> Karim
>>>
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>>>
>>
>>
>
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