Possibly easy to maintain AND flexible parameters:
use strict;
use warnings;
sub my_func
{
my %params;
my $fix_dispatcher = {
HASH => sub{ %params = %{$_[0]}},
ARRAY => sub{ %params = @{$_[0]}},
SCALAR => sub{ $params{message} = ${$_[0]}},
_DIRECT_SCALAR=> sub{ $params{message} = $_[0]},
_DIRECT_ARRAY => sub{ %params = @_},
};
my $param_type = scalar(@_)> 1 ? '_DIRECT_ARRAY'
: ref $_[0] || '_DIRECT_SCALAR';
$fix_dispatcher->{$param_type}->(@_);
print "Message received: " . $params{message};
if ($params{newline}) { print "\n" }
}
# good
my_func( { message => "Hello, world! (hashref)", newline=>1 } );
# also good
my_func( message => "Hello, world! (hash)" ,newline=>1);
my_func( "Hello, world! (Scalar)" ); print("\n");
my_func(\"Hello, world! (Scalar Ref)" ); print("\n");
my_func( "message" , "Hello, world! (array)", "newline",1 );
my_func( ["message" , "Hello, world! (array ref)", "newline",1 ]);
UPDATE1: Added "array ref" call.
UPDATE2: Deleted unnecessary variable "$fix_subref".
"From there to here, from here to there, funny things are everywhere." -- Dr. Seuss