phpman > perldoc > XML::Grove::Sub(3pm)

NAME
    XML::Grove::Sub - run a filter sub over a grove

SYNOPSIS
     use XML::Grove::Sub;

     # Using filter method on XML::Grove::Document or XML::Grove::Element:
     @results = $grove_object->filter(\&sub [, ...]);

     # Using an XML::Grove::Sub instance:
     $filterer = XML::Grove::Sub->new();
     @results = $grove_object->accept($filterer, \&sub [, ...]);

DESCRIPTION
    "XML::Grove::Sub" executes a sub, the filter, over all objects in a grove and returns a list of
    all the return values from the sub. The sub is called with the grove object as it's first
    parameter and passing the rest of the arguments to the call to `"filter()"' or `"accept()"'.

EXAMPLE
    The following filter will return a list of all `"foo"' or `"bar"' elements with an attribute
    `"widget-no"' beginning with `"A"' or `"B"'.

      @results = $grove_obj->filter(sub {
          my $obj = shift;

          if ($obj->isa('XML::Grove::Element')
              && (($obj->{Name} eq 'foo')
                  || ($obj->{Name} eq 'bar'))
              && ($obj->{Attributes}{'widget-no'} =~ /^[AB]/)) {
              return ($obj);
          }
          return ();
      });

AUTHOR
    Ken MacLeod, ken AT bitsko.us

SEE ALSO
    perl(1), XML::Grove(3), Data::Grove::Visitor(3)

    Extensible Markup Language (XML) <http://www.w3c.org/XML>