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class Array
# Wraps the object in an Array unless it's an Array. Converts the
# object to an Array using #to_ary if it implements that.
def self.wrap(object)
case object
when nil
[]
when self
object
else
if object.respond_to?(:to_ary)
object.to_ary
else
[object]
end
end
end
end
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