Class: RDF::N3::Algebra::Math::Quotient

Inherits:
ListOperator
  • Object
show all
Defined in:
lib/rdf/n3/algebra/math/quotient.rb

Overview

The subject is a pair of numbers. The object is calculated by dividing the first number of the pair by the second.

See Also:

Constant Summary collapse

NAME = 
:mathQuotient
URI = 
RDF::N3::Math.quotient

Instance Attribute Summary

Attributes included from Enumerable

#existentials, #universals

Instance Method Summary collapse

Methods inherited from ListOperator

#as_literal, #execute, #input_operand

Methods included from Builtin

#each, #evaluate, #hash, #input_operand, #rank, #to_uri

Instance Method Details

#resolve(list) ⇒ RDF::Term

The math:quotient operator takes a pair of strings or numbers and calculates their quotient.

Parameters:

Returns:

See Also:

  • ListOperator#evaluate


17
18
19
 
# File 'lib/rdf/n3/algebra/math/quotient.rb', line 17

def resolve(list)
  list.to_a.map(&:as_number).reduce(&:/)
end

#validate(list) ⇒ Boolean

The list argument must be a pair of literals.

Parameters:

Returns:

  • (Boolean)

See Also:

  • ListOperator#validate


27
28
29
30
31
32
33
34
 
# File 'lib/rdf/n3/algebra/math/quotient.rb', line 27

def validate(list)
  if super && list.all? {|le| le.is_a?(RDF::Literal)} && list.length == 2
    true
  else
    log_error(NAME) {"list is not a pair of literals: #{list.to_sxp}"}
    false
  end
end