On Sun, Jan 09, 2000 at 02:31:49AM +0800, chas wrote:
When looping over ZClass instances in a dtml-in statement, I have constantly wanted to add a numerical test condition (eg. "where X > 12" where X is a property of the instance) Yep, since <dtml in "foo"> evaluates foo as a Python expression, the following should be possible: <dtml in "_.filter(objectValues(['MyClass'], lamba x: return x > 12)">
filter(alist, func) returns a list of all items in alist for which func returns true. The lamba construct can be used to define a function on the fly, similar to LISP and other functional programming languages. lamba x: return x > 12 is the same as: def afunc(x): return x > 12 -- Stephen Pitts smpitts@midsouth.rr.com webmaster - http://www.mschess.org