Class: Cassowary::Variable

Inherits:
AbstractVariable show all
Includes:
Equalities
Defined in:
lib/variables/variable.rb

Instance Attribute Summary collapse

Attributes inherited from AbstractVariable

#name

Instance Method Summary collapse

Methods included from Equalities

#cn_equal, #cn_geq, #cn_leq

Methods inherited from AbstractVariable

#dummy?

Constructor Details

#initialize(hash) ⇒ Variable

Returns a new instance of Variable.



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# File 'lib/variables/variable.rb', line 9

def initialize(hash)
  super
  self.value = hash[:value]
end

Instance Attribute Details

#value ⇒ Object

Returns the value of attribute value.



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# File 'lib/variables/variable.rb', line 7

def value
  @value
end

Instance Method Details

#*(expr) ⇒ Object 



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# File 'lib/variables/variable.rb', line 14

def *(expr)
  self.as_linear_expression * expr
end

#+(expr) ⇒ Object 



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# File 'lib/variables/variable.rb', line 18

def +(expr)
  self.as_linear_expression + expr
end

#-(expr) ⇒ Object 



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# File 'lib/variables/variable.rb', line 22

def -(expr)
  self.as_linear_expression - expr
end

#-@ ⇒ Object 



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# File 'lib/variables/variable.rb', line 48

def -@
  -1.0.as_linear_expression * self
end

#/(expr) ⇒ Object 



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# File 'lib/variables/variable.rb', line 26

def /(expr)
  self.as_linear_expression / expr
end

#as_linear_expression ⇒ Object 



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# File 'lib/variables/variable.rb', line 30

def as_linear_expression
  expr = LinearExpression.new
  expr.terms[self] = 1.0
  expr
end

#external? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/variables/variable.rb', line 36

def external?
  true
end

#inspect ⇒ Object 



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# File 'lib/variables/variable.rb', line 52

def inspect
  "#{super}[#{value.inspect}]"
end

#pivotable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/variables/variable.rb', line 40

def pivotable?
  false
end

#restricted? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/variables/variable.rb', line 44

def restricted?
  false
end