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16 lines
314 B
Ruby
16 lines
314 B
Ruby
# This file contains the Ruby code from book of
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# "Data Structures and Algorithms
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# with Object-Oriented Design Patterns in Ruby"
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# by Bruno R. Preiss.
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#
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# Copyright (c) 2004 by Bruno R. Preiss, P.Eng. All rights reserved.
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class Visitor < AbstractObject
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abstractmethod :visit
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def done?
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false
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end
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end |