Class: Factbase::IndexedExists

Inherits:
Object
  • Object
show all
Defined in:
lib/factbase/indexed/indexed_exists.rb

Overview

Indexed term ‘exists’.

Instance Method Summary collapse

Constructor Details

#initialize(term, idx) ⇒ IndexedExists 



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# File 'lib/factbase/indexed/indexed_exists.rb', line 8

def initialize(term, idx)
  @term = term
  @idx = idx
end

Instance Method Details

#predict(maps, _fb, _params) ⇒ Object 



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# File 'lib/factbase/indexed/indexed_exists.rb', line 13

def predict(maps, _fb, _params)
  return nil if @idx.nil?
  key = [maps.object_id, @term.operands.first, @term.op]
  if @idx[key].nil?
    @idx[key] = []
    prop = @term.operands.first.to_s
    maps.to_a.each do |m|
      @idx[key].append(m) unless m[prop].nil?
    end
  end
  (maps & []) | @idx[key]
end