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  1. or download this
    #!/usr/bin/env perl
    use v5.36;
    ...
            default    { die "*** BUG: no handler for -$k.\n"; }
        }
    }
    
  2. or download this
    for my ( $k, $v ) (%opts) {
        if ( $k eq 'h' ) { HELP_MESSAGE(); }
    ...
        elsif ( $k eq 't') { $table = $v; }
        else  { die "*** BUG: no handler for -$k.\n"; }
    }