http://www.perlmonks.org?node_id=450535

One of the greatest things about hanging in PM is to occasionally hear merlyn and other esteemed monks scream "Never, never, never". From today's post and some recent posts I found a few:
  1. Never, never, never use a symbolic reference (Dynamically Building Variable Names)
  2. Never, never, never use $1 without checking the matches first (Re: WWW::Mechanize follow meta refreshes
Are there others? Of course, equally on the other side: Always, always, always.

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