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pootsbook/isbn.rb

Created July 26, 2012 13:04
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Solutions to ISBN cleaning and validation
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isbn.rb
Paste solutions in the comments below. Don't forget to make it code using GitHub markdown.
@creativenucleus
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https://gist.github.com/3181943

@graemetait
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Graeme https://gist.github.com/3181908

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