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With the onslaught of golf meditations recently (of which I shall soon be posting one -- fear not!), I'm posting a set of reminders that you may be wont to take heed of, ere you post again!
  • if you use a regex, be sure . can match a newline, by using the /s modifier to the regex
  • pop is two characters less than shift
  • assign to @_ and $_ if you can -- it saves a my declaration (if you're stingy), and allows operations like regexes and pop to work without an argument
  • screw $1 and the like, and use $& and its friends instead
  • map() is probably a useful tool to master for golf
  • leave out semicolons wherever possible
  • don't explicitly return unless you must
  • doing .$/ is shorter than ."\n" -- same for .$" vs. ." "
  • {...;redo} is shorter than while(1){...}
  • {...;$x&&redo} is shorter than while($x){...}
  • use || and &&


japhy -- Perl and Regex Hacker

In reply to Golf Do-s and Don't-s by japhy

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