Re^2: subroutine function

[tobyink]

my $left=$_[0];
my $right=$_[1];

which is the same as

my $left = shift @_;
my $right = shift @_;

It is not the same at all. The first version doesn't modify @_. The second one does modify it. The difference is often very important. (For example, if you're planning on using goto.)

use Test::More;
use Data::Dumper;

sub func1 {
    my $left=$_[0];
    my $right=$_[1];
    goto \&Data::Dumper::Dumper;
}

sub func2 {
    my $left = shift @_;
    my $right = shift @_;
    goto \&Data::Dumper::Dumper;
}

my @args = qw( a b );

# Are they the same??
is(
    func1(@args),
    func2(@args),
    "they're the same!",
);

done_testing();

[runrig]

The difference is often very important.

And the difference often doesn't matter at all. As in the OP's example. In which case they are essentially the same. Similar. Whatever. Yes, I know what the difference is; I often pass @_ to other methods after shifting off the object. And often I don't.