----- Original Message ----- From: "Lalo Martins" <lalo@hackandroll.org> To: <zope@zope.org> Sent: Monday, May 29, 2000 11:40 PM Subject: Re: [Zope] Use of lambda expression in DTML
On Mon, May 29, 2000 at 10:58:54PM -0400, Chris McDonough wrote:
<dtml-in "_.map (lambda item: Catalog.getobject
(item.data_record_id_),
Catalog (REQUEST)">
How could someone understand this when you're finished with it?
Perfectly clearly for anyone used to functional programming; I'd even say, clear on first sight. A lot easier to understand and maintain than a separate method.
Assuming I'm reading this correctly, I think I'd probably express this as: <dtml-in "Catalog(REQUEST)"> <dtml-with "Catalog.getobject(data_record_id_)"> ...foo... </dtml-with> </dtml-in> BTW, I agree that exprs should be a part of DTML. You don't want to put significant program logic in DTML, but there are many places in which exprs are useful: Total: <dtml-var "subtotal + shipping"> I'll grant that you can set up all of the variables you need via a PythonMethod beforehand, but things like this can be nice and convenient... Any power that can be given to PythonMethods securely is a boon. Kevin