Perl Style: Avoid Symbolic References

  • Beginners often think they want to have a variable contain the name of a variable.

        $fred    = 23;
        $varname = "fred";
        ++$varname;         # $fred now 24
  • This works sometimes, but is a bad idea. They only work on global variables. Global variables are bad because they can easily collide accidentally.

  • They do not work under the use strict pragma

  • They are not true references and consequently are not reference counted or garbage collected.

  • Use a hash or a real reference instead.

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Copyright © 1998, Tom Christiansen All rights reserved.



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