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Quote: Ruby uses a ! suffix to indicate methods that modify their object, and ? for predicates
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object-oriented procedures
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immutable files and data
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notation for operations
Quotation Skeleton
Listing Three shows an alternative implementation of MP3List … add our own shuffle! method. Why the exclamation … otherwise dangerous), and to append a question mark … Google-1 Google-2
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Topic: object-oriented procedures (41 items)
Topic: immutable files and data (57 items)
Topic: notation for operations (18 items)