On Mon, Mar 05, 2007 at 03:56:16PM +1030, Tom Lanyon wrote: : Larry Wall wrote: : >On Sun, Mar 04, 2007 at 06:37:34PM -0800, Jonathan Lang wrote: : >: Rick Delaney wrote: : >: >Smylers wrote: : >: >> for @invoice : >: >> { : >: >> .process; : >: >> } or fail 'No invoices to process'; : >: > : >: >If that actually works then I'm happy. : >: : >: It's dependent on .process not returning a false on the final iteration. : > : >Er, these days 'for' is more like 'map', and hence returns a list. : >So it's dependent on at least one iteration returning a non-() value. : >In fact, if the final iteration returned False, the list would be : >considered true. : > : >Larry : > : : The situation the thread is referring to has @invoice empty so no : iterations are taking place and all this is a non-issue. :)
You would still get a false positive on a non-null list if all of the iterations return (). Larry