Class: Factbase::Minus

Inherits:

TermBase

• Object
• TermBase
• Factbase::Minus

Defined in:

lib/factbase/terms/minus.rb

Overview

This class represents a 'minus' term within the Factbase. It performs a subtraction operation over the given operands.

Instance Method Summary

• #evaluate(fact, maps, fb) ⇒ Object

  Evaluate term on a fact.

• #initialize(operands) ⇒ Minus constructor

  Constructor.

Constructor Details

#initialize(operands) ⇒ Minus

Constructor.

Parameters:

• operands (Array) —

  Operands

# File 'lib/factbase/terms/minus.rb', line 12

def initialize(operands)
  super()
  @minus = Factbase::Arithmetic.new(:-, operands)
end

Instance Method Details

#evaluate(fact, maps, fb) ⇒ Object

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:

• (Object) —

  Result of the subtraction

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

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