%x = ( %x, bar => "def", baz => "ghi" );

##</code><code>##

@x{qw( bar baz )} = ( "def", "ghi" );

##</code><code>##

%$x = ( %$x, bar => "def", baz => "ghi" );

##</code><code>##

@$x{qw( bar baz )} = ( "def", "ghi" );