$4 eq 'play' is true only if $4 exactly matches 'play' - no more, no less. You may be thinking of index: my $auto = (-1 != index $4, 'play'). But even that isn't how I'd do this. A bit more perlish is: 

  my %control = map { $_ => 1 } split ' ', $4;

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This creates a hash, %control, with the keys that are specified. Instead of $auto, you would use $control{play}. Instead of $loop, you would use $control{loop}, etc.

In reply to Re: setting up boolean parameters from keywords by Tanktalus
in thread setting up boolean parameters from keywords by rand0mmm

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