class RDF::N3::Algebra::List::Append
Iff the subject is a list of lists and the concatenation of all those lists is the object, then this is true. The object can be calculated as a function of the subject.
@example
( (1 2) (3 4) ) list:append (1 2 3 4).
The object can be calculated as a function of the subject.
Constants
- NAME
- URI
Public Instance Methods
resolve(list)
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Resolves this operator using the given variable ‘bindings`. If the last operand is a variable, it creates a solution for each element in the list.
@param [RDF::N3::List] list @return [RDF::Term] @see RDF::N3::ListOperator#evaluate
# File lib/rdf/n3/algebra/list/append.rb, line 20 def resolve(list) flattened = list.to_a.map(&:to_a).flatten # Bind a new list based on the values, whos subject use made up from original list subjects subj = RDF::Node.intern(list.map(&:subject).hash) RDF::N3::List.new(subject: subj, values: flattened) end
validate(list)
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The list argument must be a pair of literals.
@param [RDF::N3::List] list @return [Boolean] @see RDF::N3::ListOperator#validate
Calls superclass method
RDF::N3::Algebra::ListOperator#validate
# File lib/rdf/n3/algebra/list/append.rb, line 33 def validate(list) if super && list.to_a.all? {|li| li.list?} true else log_error(NAME) {"operand is not a list of lists: #{list.to_sxp}"} false end end