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fearoffish/gist:3749328

Created September 19, 2012 12:12
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Ruby Units: reliable??
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gistfile1.rb
>> Unit('1 g') >> 'ounce'
=> 160000045359237 oz
>> Unit('1 ounce') >> 'g'
=> 453592371600000 g
>> Unit('1 mm').convert_to 'cm'
=> 110 cm
>> Unit('10 ounce') >> 'g'
=> 45359237160000 g
>> Unit('100 ounce') >> 'g'
=> 4535923716000 g
>> Unit('100000 ounce') >> 'g'
=> 4535923716 g
@wjessop
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wjessop commented Sep 19, 2012

I get slightly different results:

.9.3p194 :002 > require 'ruby-units'
=> true
1.9.3p194 :003 > Unit('1 g') >> 'ounce'
=> 1600000/45359237 oz
1.9.3p194 :004 > Unit('1 ounce') >> 'g'
=> 45359237/1600000 g
1.9.3p194 :005 > Unit('1 mm').convert_to 'cm'
=> 1/10 cm

@fearoffish
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Author

Interesting, it's Rational numbers. (Thanks to Mon_Ouie on #ruby)

>> Rational(3,4)
=> 34
>> Rational(3,4).inspect
=> "(3/4)"
>> (Unit('100000 ounce') >> 'g').inspect
=> "45359237/16 g"
>> (Unit('1 ounce') >> 'g').inspect
=> "45359237/1600000 g"

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