36 lines
1.0 KiB
Ruby
36 lines
1.0 KiB
Ruby
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require 'unit_conversion/constants'
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require 'unit_conversion/errors'
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require 'unit_conversion/formatters'
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require 'unit_conversion/parsed_number'
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require 'unit_conversion/parsed_unit'
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require 'unit_conversion/conversions'
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require 'unit_conversion/value_unit'
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module UnitConversion
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class << self
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def parse(value_string, unit_string = nil)
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ValueUnit.for(value_string, unit_string)
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end
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def convert(quantity, factor, input_unit, output_unit, density = nil)
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unit_value = parse(quantity, input_unit).scale(factor)
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if output_unit.present?
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unit_value = unit_value.convert(output_unit, density)
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end
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unit_value.pretty_value
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end
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# Given an awkward measurement such as '18 9/10 oz' or '5/24 cup' or '0.09434 cup',
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# it will round the rational and scale the unit to give a more reasonable, useful measurement, ie
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# 19 oz, 3 Tbsp, 1 1/2 Tbsp
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def auto_unit(quantity, units)
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unit = parse(quantity, units).auto_unit
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[unit.pretty_value, unit.unit.to_s]
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end
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end
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end
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