[Zope3-dev] Number of languages in Zope 3

[Steve Alexander]

A generator would fix this.

Chris Withers wrote:
> Hi Tres,
> 
> In your example below, what are the preformance implications of 
> iterating over the result list twice as opposed to just once?
> 
> cheers,
> 
> Chris
> 
> Tres Seaver wrote:
> 
>> In Zope3, that idiom would typically be replaced by an intermediate
>> method on the view class which did the underlying work.  E.g., where in
>> Zope2 I might to something like:
>>
>>   <div tal:repeat="snippet python:here.objectValues(['Some Type'])">
>>    <h3 tal:conetnt="python:snippet.headline(version='Brief')">HEADLINE
>>    >/h3>
>>    <div tal:content="python:snippet.teaseText(maxwords=100)>TEASE</div>
>>   </div>
>>
>> in Zope3 I would add a method to the view class which did the heavy
>> lifting:
>>
>>    def getSnippetInfo(self):
>>        results = []
>>        for snippet in [x for x in self.context.values()
>>                          if ISnippet.isImplementedBy(x) ]:
>>            results.append({'title' : snppet.headline(version='Brief'),
>>                            'tease' : snippet.teaseText(maxWords=100)})
>>        return results
>>
>> The template then becomes much clearer:
>>
>>    <div tal:repeat="info context/getSnippetInfo">
>>     <h3 tal:content="info/title">TITLE</h3>
>>     <div tal:content="info/tease">TEASE</div>
>>    </div>
> 
> 
>