Nice solution. Downsides:

• This recreates the 62 element list repeatedly in memory, since there's no place to store it.
• The number "62" is hardcoded, and must match the list exactly. That's a maintenance headache: suppose a requirement came along to ensure that underscore were included, or that digits were not.
• The int is redundant.

Implementing these three changes, I'd go with something like:

BEGIN {
  my @source = ('A'..'Z', 'a'..'z', '0'..'9');
  sub generate_random_password {
    my $id = "";
    for (1..18) {
      $id .= $source[rand @source];
    }
    $id;
  }
}
[download]

For so-called "pronounceable" passwords, try Crypt::RandPasswd. Looks nice, and based on a government standard.

-- Randal L. Schwartz, Perl hacker

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