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Re^2: Why use references?

by chas (Priest)
on Dec 12, 2005 at 01:55 UTC ( #515929=note: print w/ replies, xml ) Need Help??

in reply to Re: Why use references?
in thread Why use references?

In your "Without References" example, don't you need  return ++$arg;?
(and a semicolon after shift?)
Also, consider the following:
sub increment { ++$_[0]; } $num=0; increment($num); print $num,"\n";
which shows that args are passed "by reference" by default. Of course, it may not be good style to alter @_ in this way, but the point is that you don't need to pass a reference to alter the argument inside the sub.
(Updated to make less confusing.)
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