Paul Moore <[EMAIL PROTECTED]> wrote: > > On Wed, 23 Mar 2005 10:33:53 -0600 (CST), Ka-Ping Yee > <[EMAIL PROTECTED]> wrote: > > It dawned on me that you could use this idea to make the whole > > filter/lambda experience vastly more pleasant. I whipped up a quick > > implementation: > > > > >>> from placeholder import _ > > >>> numbers = [5, 9, 56, 34, 1, 24, 37, 89] > > >>> filter(_ < 30, numbers) > > [5, 9, 1, 24] > > >>> map(_ + 10, numbers) > > [15, 19, 66, 44, 11, 34, 47, 99] > > >>> > > > > Look ma, no lambdas! > > > > I bet someone has already done this before, right? > > I thought about it, but couldn't convince myself that it would work > properly in all cases. I was thinking in terms of operator overloading > of everything possible - how did you do it?
PyTables allows something very similar for "in-kernel" searches of data, but only on a single constraint. I would imagine that Ka-Ping did it by only allowing a single operation per item. - Josiah _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
