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Re^3: trouble understanding code, and shift() w.o args

by GotToBTru (Vicar)
on Aug 04, 2011 at 16:47 UTC ( #918588=note: print w/ replies, xml ) Need Help??


in reply to Re^2: trouble understanding code, and shift() w.o args
in thread trouble understanding code, and shift() w.o args

Yes, that's how you'd add a third argument. You would need to also add a third shift in the subroutine to use it.

Perl's handling of parameters to subroutines is strange; every other language I have used requires the parameters be listed in the subroutine definition. I have often seen

sub translate { my ($noun, $verb, $object) = @_; my $german = "$noun $object $verb"; return($german); }

in order to document what the subroutine expects: 1) three arguments, 2) in the order noun, verb, object. Also, that would be less confusing to a novice Perl programmer because it explicitly names @_, instead of assuming you know about it. Which, of course, now you do.


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