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Stuff
Wednesday, August 1st, 2007 at 7:43:53pm UTC 

  1. -s   enables rudimentary switch parsing for switches on the command
  2.             line after the program name but before any filename arguments (or
  3.             before an argument of --).  Any switch found there is removed from
  4.             @ARGV and sets the corresponding variable in the Perl program.
  5.             The following program prints "1" if the program is invoked with a
  6.             -xyz switch, and "abc" if it is invoked with -xyz=abc.
  7.  
  8.                 #!/usr/bin/perl -s
  9.                 if ($xyz) { print "$xyz\n" }
  10.  
  11.             Do note that a switch like --help creates the variable ${-help},
  12.             which is not compliant with "strict refs".  Also, when using this
  13.             option on a script with warnings enabled you may get a lot of spuâ
  14.             rious "used only once" warnings.

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