Class: Factbase::ToFloat

Inherits:

TermBase

• Object
• TermBase
• Factbase::ToFloat

Defined in:

lib/factbase/terms/to_float.rb

Overview

Represents a float conversion term 'to_float'. This class is used to evaluate a term and return its float representation.

Instance Method Summary

• #evaluate(fact, maps, fb) ⇒ Float

  Evaluate term on a fact.

• #initialize(operands) ⇒ ToFloat constructor

  Constructor.

Constructor Details

#initialize(operands) ⇒ ToFloat

Constructor.

Parameters:

• operands (Array) —

  Operands

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

def initialize(operands)
  super()
  @operands = operands
end

Instance Method Details

#evaluate(fact, maps, fb) ⇒ Float

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:

• (Float) —

  Float representation of the value

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

def evaluate(fact, maps, fb)
  assert_args(1)
  vv = _values(0, fact, maps, fb)
  return if vv.nil?
  to_float(vv[0])
end