Class: Weight

Inherits:
Object
  • Object
show all
Includes:
Comparable
Defined in:
lib/weight_conversion.rb

Instance Method Summary collapse

Constructor Details

#initialize(value = 0.0, unit = 'lb') ⇒ Weight 



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# File 'lib/weight_conversion.rb', line 7

def initialize(value=0.0, unit='lb')
   self.value = value
   self.unit = unit
end

Instance Method Details

#*(other) ⇒ Object

Raises:

  • (TypeError) 


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# File 'lib/weight_conversion.rb', line 68

def *(other)
   raise TypeError, 'You can only multiply by a number' unless other.is_a?(Numeric)
   self.class.new(value * other, unit)
end

#+(other) ⇒ Object 



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# File 'lib/weight_conversion.rb', line 48

def +(other)
   return if is_not_weight?(other)
   self.class.new(value + other_value(other), unit)
end

#-(other) ⇒ Object 



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# File 'lib/weight_conversion.rb', line 53

def -(other)
   return if is_not_weight?(other)
   self.class.new(value - other_value(other), unit)
end

#/(other) ⇒ Object

Raises:

  • (TypeError) 


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# File 'lib/weight_conversion.rb', line 73

def /(other)
   raise TypeError, 'You can only divide by a number' unless other.is_a?(Numeric)
   self.class.new(value / other, unit)
end

#<=>(other) ⇒ Object 



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# File 'lib/weight_conversion.rb', line 58

def <=>(other)
   return if is_not_weight?(other)
   self.to_gms <=> other.to_gms
end

#==(other) ⇒ Object 



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# File 'lib/weight_conversion.rb', line 63

def ==(other)
   return if is_not_weight?(other)
   self.to_gms  == other.to_gms
end

#to_f ⇒ Object 



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# File 'lib/weight_conversion.rb', line 44

def to_f
   value.round(4).to_f
end

#to_gms ⇒ Object 



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# File 'lib/weight_conversion.rb', line 24

def to_gms
   data_in_grams.round(4)
end

#to_i ⇒ Object 



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# File 'lib/weight_conversion.rb', line 40

def to_i
   value.round
end

#to_kgs ⇒ Object 



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# File 'lib/weight_conversion.rb', line 36

def to_kgs
   (data_in_grams / grams_per_kilogram).round(4)
end

#to_lbs ⇒ Object 



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# File 'lib/weight_conversion.rb', line 32

def to_lbs
   (data_in_grams / grams_per_pound).round(4)
end

#to_ozs ⇒ Object 



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# File 'lib/weight_conversion.rb', line 28

def to_ozs
   (data_in_grams / grams_per_ounce).round(4)
end

#translated ⇒ Object 



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# File 'lib/weight_conversion.rb', line 12

def translated
 I18n.t("weight.units.#{unit}")
end

#unit ⇒ Object 



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# File 'lib/weight_conversion.rb', line 20

def unit
   @input_unit
end

#value ⇒ Object 



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# File 'lib/weight_conversion.rb', line 16

def value
   @input_value
end