Class: Factbase::Count

Inherits:

TermBase

• Object
• TermBase
• Factbase::Count

Defined in:

lib/factbase/terms/count.rb

Overview

The ‘count’ term is used to perform a count operation on a set of maps.

Instance Method Summary

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

  Evaluate term on a fact.

• #initialize(operands) ⇒ Count constructor

  Constructor.

Methods included from TermShared

#to_s

Constructor Details

#initialize(operands) ⇒ Count

Constructor.

Parameters:

• operands (Array) —

  Operands

# File 'lib/factbase/terms/count.rb', line 11

def initialize(operands)
  super()
  @operands = operands
  @op = :count
end

Instance Method Details

#evaluate(_fact, maps, _fb) ⇒ Integer

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:

• (Integer) —

  The count of maps

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

def evaluate(_fact, maps, _fb)
  maps.size
end