my $_name     = param('name')    || '';
my $_color    = param( 'color' ) || '';

##</code><code>##

my ($_name, $_color) = map {param($_) || ''} qw(name color);

##</code><code>##

my ($_name, $_color) = 
		map {defined($_) ? $_ : ''} map {param($_)} qw(name color);