Class: Factbase::Min

Inherits:

TermBase

• Object
• TermBase
• Factbase::Min

Defined in:

lib/factbase/terms/min.rb

Overview

The ‘min’ term. This term calculates the minimum value among the evaluated operands.

Constant Summary

MIN =

Factbase::Best.new { |v, b| v < b }

Instance Method Summary

• #evaluate(_fact, maps, _fb) ⇒ Object

  Evaluate term on a fact.

• #initialize(operands) ⇒ Min constructor

  Constructor.

Methods inherited from TermBase

#to_s

Constructor Details

#initialize(operands) ⇒ Min

Constructor.

Parameters:

• operands (Array) —

  Operands

# File 'lib/factbase/terms/min.rb', line 17

def initialize(operands)
  super()
  @operands = operands
  @op = :min
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) —

  The minimum value among the evaluated operands

# File 'lib/factbase/terms/min.rb', line 28

def evaluate(_fact, maps, _fb)
  assert_args(1)
  MIN.evaluate(@operands[0], maps)
end