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pedro-vasconcelos/shortcut-1

Created August 21, 2012 09:30
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Test if a variable exists
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shortcut-1
winners[buyer] ||= [] is a shortcut to:
winners[buyer] = winners[buyer] || [] is a shortcut to:
Set winners[buyer] equal to winners[buyer] or, if winners[buyer] is nil, set it to [].
You’re just making sure a variable is set before using it.
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