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Contents
module SPARQL; module Algebra
class Operator
##
# The SPARQL logical `rand` operator.
#
# Returns a pseudo-random number between 0 (inclusive) and 1.0e0 (exclusive). Different numbers can be produced every time this function is invoked. Numbers should be produced with approximately equal probability.
#
# @example
# (rand)
#
# @see http://www.w3.org/TR/sparql11-query/#idp2130040
class Rand < Operator::Nullary
include Evaluatable
NAME = :rand
##
# Returns a pseudo-random number between 0 (inclusive) and 1.0e0 (exclusive). Different numbers can be produced every time this function is invoked. Numbers should be produced with approximately equal probability.
#
# @return [RDF::Literal::Double] random value
def apply
RDF::Literal::Double.new(Random.rand)
end
end # Rand
end # Operator
end; end # SPARQL::Algebra
Version data entries
11 entries across 11 versions & 1 rubygems