James Edward Gray II wrote: > On Mar 1, 2004, at 3:59 AM, Gary Stainburn wrote: > > > Okay, I can do that simply enough, but could you elaborate on the > > reason > > please. > > Sure. > > Subroutines may be called recursively. If a subroutine iscalled using > > the "&" form, the argument list is optional, and if omitted, no @_ > array is set up for the subroutine: the @_ array at the time of the > call is visible to subroutine instead. This is an efficiency > mechanism > that new users may wish to avoid. > > That's a quote from 'perldoc perlsub', which does a far better job of > explaining these things than I could. It's worth a look.
I must say, I was sort of mystified, in reading this, as to why one would want to do this in a recursive subroutine. I guess it might just be different recusrion styles. For me, it is the change in arguments as a subroutine calls itself that powers the work, and that leads to the stopping case[s]. It might be interesting to see an example of a recursive call that retained its pparameter list, with or without the use of the syntactic shortcut. Joseph -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] <http://learn.perl.org/> <http://learn.perl.org/first-response>
