Re: idiom for iterating

thanks! your way of doing it looks like it should work; matching the
whole thing *including* the starting tag first, and then separating
out the start tag later.

On Wed, Apr 22, 2009 at 7:53 PM, Chris Babcock
<[email protected]> wrote:
> On Wed, 22 Apr 2009 16:25:43 +0200
> Thomas Michael Hagen <[email protected]> wrote:
>
>> i have resorted to this clumsy hack:
>>
>>       match (:: :url: :text: :next-url:) [:file:] /(#http:.*?CET
>> ....)(.*?)(#http:|$)/
>>       isolate (:article:) /:*:url::*:text:/
>>       call /:main:/ [:*:article:]
>>       {
>>           match <fromnext> (:: :url: :text: :next-url:) [:file:]
>> /(#http:.*?CET ....)(.*?)(#http:|$)/
>>           isolate (:article:) /:*:url::*:text:/
>>           call /:main:/ [:*:article:]
>>           liaf
>>       }
>>
>> there must be a better way than duplicating all that code, right?
>
> Try "match [:file:] (::) /^/" before going into your loop. That will
> position the string pointer to the begining of the variable... or you
> can spend some hours combing through your code to see if your opening
> marker ended up as part of another match prior to this section of code.
>
> It's always so much easier to solve others problems than your own. I
> have a similar parsing situation involving a flatfile user registration
> database that contains user-formated data. Not even all the email
> (Email:|E-mail:) fields have the same label! The only field that I can
> parse on is the "User:" field at the begining of the record. My first
> draft used an idiom like:
>
>        {
>        match (:: :record:) /(User:.+?)User/
>        # Do stuff
>        alter (:record:) //
>        liaf
>        }
>
> Chris
>
>
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