Comment by draegtun

The article doesn't mention Perl at all but it did have some direct influences on Ruby.

Even Ruby's trailing blocks syntax are an homage to Perl's block list subroutines:

  # first Ruby example in article
  users.select { |u| u.admin? }.map(&:email)

  # using Perl's block list
  map {$_->email} grep {$_->is_admin} @users;