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paperh18648 margl-907 margr0 margt0 margb0 fi0 ri0 ql sb0 f1 fs24 Copyright f3 'e3f1 1994 by NeXT Computer, Inc. All Rights Reserved.
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fs36 NSMutableCopying
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fs28 f0 b fs24 Adopted By:tab b0 fs28 f1 various OpenStep classes
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fs28 s13 fi-2771 ri1007 ql f0 b fs24 Declared In:tab b0 fs28 f1 Foundation/NSObject.h
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fs28 Protocol Description
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fs28 A class that defines an 'aaimmutable vs. mutable'ba distinction adopts this protocol to allow mutable copies of its instances to be made. A mutable copy of an object is usually a i shallow copyi0 (as opposed to the i deep copyi0 defined in the NSCopying protocol specification). The original and its copy share references to the same instance variables, so that if a component of the copy is changed, for example, that change is reflected in the original.
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fs28 A class that doesn'27t define an 'aaimmutable vs. mutable'ba distinction but that needs to offer both deep and shallow copying shouldn'27t adopt this protocol. The NSCopying methods should by default be assumed to produce deep copies; the class can then also implement methods to produce shallow copies.
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fs28 Contrary to most methods, the returned value is owned by the caller, who is responsible for releasing it.
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fs28 Making Mutable Copies of Objects
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fs28 fi-6552 {f3 -} (id)b mutableCopyWithZone:b0 (NSZone *)i zonei0 tab Returns a new instance that'27s a top level, mutable copy of the receiver. For a collection, objects in the collection are retained. Memory for the new instance is allocated from i zonei0 . The returned object is owned by the caller, who is responsible for releasing it.
}These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.