Top Level Namespace

Defined Under Namespace

Modules: Judges Classes: Object

Instance Method Summary collapse

Instance Method Details

#if_absent(fb) {|f| ... } ⇒ Object

Injects a fact if it’s absent in the factbase.

Yields:

  • (f) 


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# File 'lib/judges/fb/if_absent.rb', line 27

def if_absent(fb)
  attrs = {}
  f = Judges::Accumulator.new(attrs)
  yield f
  q = attrs.map do |k, v|
    vv = v.to_s
    if v.is_a?(String)
      vv = "'#{vv.gsub('"', '\\"').gsub("'", "\\'")}'"
    elsif v.is_a?(Time)
      vv = v.iso8601
    end
    "(eq #{k} #{vv})"
  end.join(' ')
  q = "(and #{q})"
  return unless fb.query(q).each.to_a.empty?
  n = fb.insert
  attrs.each { |k, v| n.send("#{k}=", v) }
  n
end

#once(fb, judge: $judge) ⇒ Object

Returns a decorated global factbase, which only touches facts once



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# File 'lib/judges/fb/once.rb', line 26

def once(fb, judge: $judge)
  Judges::Once.new(fb, judge)
end