RDF::Trine::Iterator::Boolean(3) Iterator class for boolean query results


This document describes RDF::Trine::Iterator::Boolean version 1.014


use RDF::Trine::Iterator::Boolean;

my $iterator = RDF::Trine::Iterator::Boolean->new( [1] );
my $bool = $iterator->get_boolean;
if ($bool) {
print "Yes.\n";


Beyond the methods documented below, this class inherits methods from the RDF::Trine::Iterator class.
"new ( \@results, %args )"
"new ( \&results, %args )"
Returns a new SPARQL Result interator object. Results must be either an reference to an array containing results or a CODE reference that acts as an iterator, returning successive items when called, and returning undef when the iterator is exhausted.

$type should be one of: bindings, boolean, graph.

Returns true if the underlying result is a boolean value.
"as_string ( $max_size [, \$count] )"
Returns a string serialization of the stream data.
"as_xml ( $max_size )"
Returns an XML serialization of the stream data.
"print_xml ( $fh, $max_size )"
Prints an XML serialization of the stream data to the filehandle $fh.
"as_json ( $max_size )"
Returns a JSON serialization of the stream data.
Returns the arguments necessary to pass to the stream constructor _new to re-create this stream (assuming the same closure as the first





Please report any bugs or feature requests to through the GitHub web interface at <https://github.com/kasei/perlrdf/issues>.


Gregory Todd Williams "<[email protected]>"


Copyright (c) 2006-2012 Gregory Todd Williams. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.