Implied Arguments in perl

When calling a subroutine with the "&" sigil prefix and no parenthesis, the current @_

array gets implicitely passed to the subroutine being called. This can cause subtly odd

behaviour if you are not expecting it.

sub second_level {

print Dumper \@_;

}

sub first_level {

# using '&' sigil and no parens.

# doesn't look like I'm passing any params

# but perl will pass @_ implicitely.

&second_level;

}

first_level(1,2,3);

> $VAR1 = [

> 1,

> 2,

> 3

> ];