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Why design patterns are easier in dynamic languages
Message
De
11/02/2008 09:02:50
Mike Yearwood
Toronto, Ontario, Canada
 
 
À
10/02/2008 15:59:54
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Divers
Thread ID:
01291156
Message ID:
01291371
Vues:
18
>>>Yeah, we use a parser class that builds the whole sql statement from objects created from metadata. ( I can't take credit for any of it, Mike and Toni wrote it all ) but it has the advantage of being very flexible and incorporating metadata props and any code you want to use in subclassed instances of the cursor, field or parameter objects.
>>
>>I remember most of it. Although it's now about six years since I last had my fingers in VFE, I still remember how many neat tricks were inside, made possible by the quite strict and straightforward OOP thinking applied.
>
>The design has held up very well as the framework has evolved since then. In the last three years Mike and Toni and I have been doing all our development against SQL server so there has been a lot of thought about that, especially about means of minimizing wire traffic. ( for example bizobjs that use two cursors - one for the list returned by the parameterized view for further selection - it contains only fields needed to pick a record - and a data entry cursor that contains only one record but all the fields. Makes a huge performance difference in some cases )

I showed Mike that one. :)
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