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rdf::trine::variablebindings(3pm) [debian man page]

RDF::Trine::VariableBindings(3pm)			User Contributed Perl Documentation			 RDF::Trine::VariableBindings(3pm)

NAME

       RDF::Trine::VariableBindings - Variable bindings

VERSION

       This document describes RDF::Trine::VariableBindings version 1.000

SYNOPSIS

	 use RDF::Trine qw(literal);
	 use RDF::Trine::VariableBindings;
	 my $vb = RDF::Trine::VariableBindings->new( {} );
	 $vb->set( foo => literal("bar") );
	 $vb->set( baz => literal("blee") );
	 $vb->variables; # qw(foo baz)

	 my $x = RDF::Trine::VariableBindings->new( { foo => literal("bar") } );
	 $x->set( greeting => literal("hello") );

	 my $j = $vb->join( $x ); # { foo => "bar", baz => "blee", greeting => "hello" }

	 my @keys = qw(baz greeting);
	 my $p = $j->project( @keys ); # { baz => "blee", greeting => "hello" }
	 print $p->{greeting}->literal_value; # "hello"

DESCRIPTION

       RDF::Trine::VariableBindings objects provide a mapping from variable names to RDF::Trine::Node objects. The objects may be used as a hash
       reference, with variable names used as hash keys.

METHODS

       "new ( \%bindings )"
       "set ( $variable_name => $node )"
       "join ( $row )"
	   Returns a new VariableBindings object based on the join of this object and $row.  If the two variable binding objects cannot be joined,
	   returns undef.

       "variables"
       "project ( @keys )"
	   Returns a new binding with values for only the keys listed.

       "as_string"
	   Returns a string representation of the variable bindings.

       "label ( $label => $value )"
	   Sets the named $label to $value for this variable bindings object.  If no $value is given, returns the current label value, or undef if
	   none exists.

       "copy_labels_from ( $vb )"
	   Copies the labels from $vb, adding them to the labels for this object.

BUGS

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

AUTHOR

	Gregory Todd Williams <gwilliams@cpan.org>

COPYRIGHT

       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.

perl v5.14.2							    2012-06-29					 RDF::Trine::VariableBindings(3pm)

Check Out this Related Man Page

RDF::Trine::Iterator::Bindings::Materialized(3pm)	User Contributed Perl Documentation	 RDF::Trine::Iterator::Bindings::Materialized(3pm)

NAME

       RDF::Trine::Iterator::Bindings::Materialized - Materialized bindings class

VERSION

       This document describes RDF::Trine::Iterator::Bindings::Materialized version 1.000

SYNOPSIS

	   use RDF::Trine::Iterator;

	   my $iterator = RDF::Trine::Iterator::Bindings::Materialized->new( @data, @names );
	   while (my $row = $iterator->next) {
	       my @vars        = keys %$row;
	       # do something with @vars
	   }

	   my $iterator = RDF::Trine::Iterator::Bindings->new( &code, @names );
	   my $miter = $iterator->materialize;
	   while (my $row = $miter->next) {
	       my @vars        = keys %$row;
	       # do something with @vars
	   }
	   $miter->reset; # start the iteration again
	   while (my $row = $miter->next) {
	       # ...
	   }

METHODS

       Beyond the methods documented below, this class inherits methods from the RDF::Trine::Iterator::Bindings class.

       "new ( @results, @names, %args )"
	   Returns a new materialized bindings interator. Results must be a reference to an array containing individual results.

       "reset"
	   Returns the iterator to its starting position.

       "next"
	   Returns the next item in the iterator.

       "length"
	   Returns the number of elements in the iterator.

BUGS

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

AUTHOR

       Gregory Todd Williams  "<gwilliams@cpan.org>"

COPYRIGHT

       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.

perl v5.14.2							    2012-06-29			 RDF::Trine::Iterator::Bindings::Materialized(3pm)
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