Re: 20 most important Perl Best Practices

"In Perl it is not possible to create a private function like in Java or C++."

It's not especially difficult...

sub my_function {
  croak "my_function is private" unless caller(0) eq __PACKAGE__;
  # body of function goes here
}
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MooseX::Privacy makes creating private and protected methods really easy (if you're already using Moose).

perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

In Section Meditations