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

okay this definately helped, :-) but what if i want an additional filepath as one of the arguments in the subroutine? would it be somethin like this?

$ret_value = getXCharacterPatterns($var1, $var2, $filepath2);
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wow, u have no idea how much that helped, thx a lot

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Re^3: trouble understanding code, and shift() w.o args by GotToBTru (Prior) on Aug 04, 2011 at 16:47 UTC
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); }` [download] 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.	[reply] [d/l]

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Re^3: trouble understanding code, and shift() w.o args
by GotToBTru (Prior) on Aug 04, 2011 at 16:47 UTC

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);
}
[download]

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.

[reply]
[d/l]