Class: Variable

Inherits:
Struct
  • Object
show all
Defined in:
lib/strom/variable.rb

Direct Known Subclasses

Ampere, Ohm, Volt

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#value ⇒ Object

Returns the value of attribute value

Returns:

  • (Object) —

    the current value of value



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# File 'lib/strom/variable.rb', line 1

def value
  @value
end

Instance Method Details

#and(other) ⇒ Object 



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# File 'lib/strom/variable.rb', line 10

def and(other)
  current = resistance = voltage = nil

  [self, other].each do |element|
    case element
    when Ampere
      current = element.value
    when Ohm
      resistance = element.value
    when Volt
      voltage = element.value
    end
  end

  if current.nil?
    Ampere.new(voltage / resistance)
  elsif resistance.nil?
    Ohm.new(voltage / current)
  elsif voltage.nil?
    Volt.new(current * resistance)
  end
end

#inspect ⇒ Object 



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# File 'lib/strom/variable.rb', line 6

def inspect
  to_s
end

#to_s ⇒ Object 



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# File 'lib/strom/variable.rb', line 2

def to_s
  "#{value} #{self.class.to_s.downcase}s"
end