Module: Factbase::Ordering

Included in:
Term
Defined in:
lib/factbase/terms/ordering.rb

Overview

Ordering terms.

Author

Yegor Bugayenko ([email protected])

Copyright

Copyright © 2024-2025 Yegor Bugayenko

License

MIT

Instance Method Summary collapse

Instance Method Details

#prev(fact, maps, fb) ⇒ Object 



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# File 'lib/factbase/terms/ordering.rb', line 14

def prev(fact, maps, fb)
  assert_args(1)
  before = @prev
  v = _values(0, fact, maps, fb)
  @prev = v
  before
end

#unique(fact, maps, fb) ⇒ Object 



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# File 'lib/factbase/terms/ordering.rb', line 22

def unique(fact, maps, fb)
  @uniques = [] if @uniques.nil?
  assert_args(1)
  vv = _values(0, fact, maps, fb)
  return false if vv.nil?
  vv = [vv] unless vv.respond_to?(:to_a)
  vv.each do |v|
    return false if @uniques.include?(v)
    @uniques << v
  end
  true
end