Perl Style: Learn to Switch with for

  • Though Perl has no built-in switch statement, this is not a hardship but an opportunity.
  • It’s easy to build one. The word `for’ is sometimes pronounced `switch’.

       SWITCH: for ($where) {
                   /In Card Names/     && do { push @flags, '-e'; last; };
                   /Anywhere/          && do { push @flags, '-h'; last; };
                   /In Rulings/        && do {                    last; };
                   die "unknown value for form variable where: `$where'";
  • Like a series of elsifs, a switch should always have a default case, even if the default case `can’t happen’.

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Copyright © 1998, Tom Christiansen All rights reserved.



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