Class: Measured::ConversionTableBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/measured/conversion_table_builder.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(units) ⇒ ConversionTableBuilder

Returns a new instance of ConversionTableBuilder.



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# File 'lib/measured/conversion_table_builder.rb', line 4

def initialize(units)
  @units = units
end

Instance Attribute Details

#units ⇒ Object (readonly)

Returns the value of attribute units.



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# File 'lib/measured/conversion_table_builder.rb', line 2

def units
  @units
end

Instance Method Details

#to_h ⇒ Object 



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# File 'lib/measured/conversion_table_builder.rb', line 8

def to_h
  table = {}

  units.map{|u| u.name}.each do |to_unit|
    to_table = {to_unit => Rational(1, 1)}

    table.each do |from_unit, from_table|
      conversion = find_conversion(to: from_unit, from: to_unit)
      to_table[from_unit] = conversion
      from_table[to_unit] = 1 / conversion
    end

    table[to_unit] = to_table
  end

  table
end