-class Object
- # Can you safely .dup this object?
- # False for nil, false, true, symbols, and numbers; true otherwise.
- def duplicable?
- true
- end
-end
-
-class NilClass #:nodoc:
- def duplicable?
- false
- end
-end
-
-class FalseClass #:nodoc:
- def duplicable?
- false
- end
-end
-
-class TrueClass #:nodoc:
- def duplicable?
- false
- end
-end
-
-class Symbol #:nodoc:
- def duplicable?
- false
- end
-end
-
-class Numeric #:nodoc:
- def duplicable?
- false
- end
-end
-
-class Class #:nodoc:
- def duplicable?
- false
- end
-end