Question

I always use @_[0] to get the first parameter and use @_[1] to get the second one. But when I search up code snippets online, I find many people like to use the shift keyword. I don’t find the shift keyword being intuitive at all. Is there any functional differences between these two?

Answer 1

Yes, there is a difference between the two.
shift would change the @_
(You could argue this would be an operation that would make shift slower)
$_[0] or $_[1] is just assignment and would not change @_ at all.

The aesthetic way of writing this is :

sub this_is_better {
    my ( $foo, $bar, $hey, $whoa, $doll, $bugs ) = @_;
}