Class: Factbase::Eq

Inherits:

TermBase

• Object
• TermBase
• Factbase::Eq

Defined in:

lib/factbase/terms/eq.rb

Overview

Represents an equality term in the Factbase. This class encapsulates the evaluation of equality comparisons between operands within the context of a Factbase.

Instance Method Summary

• #evaluate(fact, maps, fb) ⇒ Boolean

  Evaluate term on a fact.

• #initialize(operands) ⇒ Eq constructor

  Constructor.

Methods inherited from TermBase

#to_s

Constructor Details

#initialize(operands) ⇒ Eq

Constructor.

Parameters:

• operands (Array) —

  Operands

# File 'lib/factbase/terms/eq.rb', line 15

def initialize(operands)
  super()
  @op = Factbase::Compare.new(:==, operands)
end

Instance Method Details

#evaluate(fact, maps, fb) ⇒ Boolean

Evaluate term on a fact.

Parameters:

• fact (Factbase::Fact) —

  The fact

• maps (Array<Factbase::Fact>) —

  All maps available

• fb (Factbase) —

  Factbase to use for sub-queries

Returns:

• (Boolean) —

  The result of the equality comparison

# File 'lib/factbase/terms/eq.rb', line 25

def evaluate(fact, maps, fb)
  @op.evaluate(fact, maps, fb)
end