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Small refactor and completions
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== Quantities ==
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Collecting quantity isn't so simple:
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* we can see various units
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* we can see various ways of dealing with net weight and drained weight
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* sometimes portions are well specified and sometimes not
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* we can see many ways of ordering printed data on the packages
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* ...
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=== Units ===
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...
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=== e sign ===
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The ℮ is used in Europe and other countries, at least Australia: https://www.industry.gov.au/sites/default/files/2019-04/guide-to-the-average-quantity-system.pdf (p. 12)
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It seems to refer to the Average Quantity System (AQS) which is in use in Australia, Canada, European Union, India, Japan, New Zealand, South Africa and Switzerland -- source: https://www.sfa.gov.sg/docs/default-source/tools-and-resources/resources-for-businesses/avabriefingonaqsslides1 (slide 3). I'll put all in the wiki.
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== How to enter the data ==
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For the moment, the best is to enter the data as it is printed on the product.
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== How to handle it ==
 
== How to handle it ==
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=== Logic to handle it ===
 
=== Logic to handle it ===
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...
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=== Existing libraries to parse weights and quantities ===
 
=== Existing libraries to parse weights and quantities ===
 
* https://github.com/iancanderson/ingreedy
 
* https://github.com/iancanderson/ingreedy

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