Class: Data::Units

Inherits:
Object
  • Object
show all
Includes:
Comparable
Defined in:
lib/barometer/data/units.rb

Direct Known Subclasses

Distance, Pressure, Speed, Temperature

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(metric = true) ⇒ Units

Returns a new instance of Units.



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# File 'lib/barometer/data/units.rb', line 7

def initialize(metric=true); @metric = metric; end

Instance Attribute Details

#metric ⇒ Object

Returns the value of attribute metric.



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# File 'lib/barometer/data/units.rb', line 5

def metric
  @metric
end

Instance Method Details

#<<(value) ⇒ Object

assigns a value to the right attribute based on metric setting



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# File 'lib/barometer/data/units.rb', line 19

def <<(value)
  return unless value
  
  # these values can be treated like 'nil'
  nil_values = ["NA", "N/A", ""]

  begin
    if value.is_a?(Array)
      value_m = value[0].to_f if (value[0] && !nil_values.include?(value[0]))
      value_i = value[1].to_f if (value[1] && !nil_values.include?(value[1]))
      value_b = nil
    else
      value_m = nil
      value_i = nil
      value_b = value.to_f if (value && !nil_values.include?(value))
    end
  rescue
    # do nothing
  end

  self.metric? ? self.metric_default = value_m || value_b :
    self.imperial_default = value_i || value_b
end

#imperial! ⇒ Object 



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# File 'lib/barometer/data/units.rb', line 15

def imperial!; @metric=false; end

#imperial_default=(value) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/barometer/data/units.rb', line 46

def imperial_default=(value); raise NotImplementedError; end

#metric! ⇒ Object 



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# File 'lib/barometer/data/units.rb', line 14

def metric!; @metric=true; end

#metric? ⇒ Boolean

HELPERS

Returns:

  • (Boolean) 


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# File 'lib/barometer/data/units.rb', line 13

def metric?; @metric; end

#metric_default=(value) ⇒ Object

stubs

Raises:

  • (NotImplementedError) 


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# File 'lib/barometer/data/units.rb', line 45

def metric_default=(value); raise NotImplementedError; end