On Friday 08 October 2010 15:03:47 Jonas Bull wrote:
> Only one thing I'd mention:
>
> Under "Subroutine Arguments Handling" you offer $var=shift; as a
> better alternative to $var=$_[n] - which it is - but it is a
> (admittedly slight) performance hit vs ($var,$var2,...)=...@_;
>
Well, one good use case for «my $var = shift;» is this:
sub my_method
{
my $self = shift;
my ($arg1, $arg2, $arg3 ... ) = @_;
.
.
.
return $self->_other_method(@_);
}
In perl-5.10.0 before perl-5.10.1 came out, there was a significant slowdown
in the execution of one of the forms, but I don't remember which one.
In any case, both forms are acceptable and make for good practices, and the
performance hit is not significant.
>
> Otherwise, pretty useful info. I'm forwarding the link to the rest of
> my group. :-)
>
Thanks!
Regards,
Shlomi Fish
> Jonas Bull
>
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