[fpc-pascal] XML Iteration

[Luiz Americo Pereira Camara]

Lee Jenkins escreveu:
> Luiz Americo Pereira Camara wrote:
>> Frank Church escreveu:
>>> I am glad to see someone with an interest in FPCs XML. Do you have
>>> some experience with XPath usage in PFC/Lazarus?
>>>
>>>   
>>
>
> Luiz,
>
> In Unit1.pas:
>
> XPathResult := EvaluateXPathExpression('//Descricao', 
> XmlTree.DocumentElement);
>   if (XPathResult <> nil) then
>   begin
>     for i := 0 to XPathResult.AsNodeSet.Count - 1 do
>     begin
>       Node := TDOMNode(XPathResult.AsNodeSet[i]);
>       if Node.FirstChild <> nil then
>         Memo1.Lines.Add(UTF8Encode(Node.FirstChild.NodeValue));
>     end;
>     XPathResult.Destroy;
>   end;
>   XmlTree.Free;
>
>
> Why the call to XPathResult.Destroy ?  Is it for reference counting?  
> Just seems something else to remember (use destroy instead of free)...

No special reason.

Free is redundant in this case since i already knows that XPathResult <> nil

Luiz

>
> Thanks
>
> -- 
> Warm Regards,
>
> Lee
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