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copied!<p>This is fairly straight forward setting/getter stuff:</p> <p><strong>XYZArray.h</strong></p> <pre><code>#import <Cocoa/Cocoa.h> @interface XYZArray : NSObject { NSMutableArray *x; NSMutableArray *y; NSMutableArray *z; } -(NSMutableArray*) x; -(NSMutableArray*) y; -(NSMutableArray*) z; -(void) setX:(NSMutableArray*)newArray; -(void) setY:(NSMutableArray*)newArray; -(void) setZ:(NSMutableArray*)newArray; @end </code></pre> <p><strong>XYZArray.m</strong></p> <pre><code>#import "XYZArray.h" @implementation XYZArray - (id)init { if((self = [super init])) { x = [[NSMutableArray alloc] init]; y = [[NSMutableArray alloc] init]; z = [[NSMutableArray alloc] init]; } return self; } - (void) dealloc { [x release]; [y release]; [z release]; [super dealloc]; } -(NSMutableArray*) x { return x; } -(NSMutableArray*) y { return y; } -(NSMutableArray*) z { return z; } -(void) setX:(NSMutableArray*)newArray { [newArray retain]; [x release]; x = newArray; } -(void) setY:(NSMutableArray*)newArray { [newArray retain]; [y release]; y = newArray; } -(void) setZ:(NSMutableArray*)newArray { [newArray retain]; [z release]; z = newArray; } @end </code></pre> <p>Better still, if you are using Objective-C 2.0 you can do all of this with properties and not write any code at all. Read this for an introduction, <a href="http://macdevelopertips.com/objective-c/objective-c-properties-setters-and-dot-syntax.html" rel="nofollow">http://macdevelopertips.com/objective-c/objective-c-properties-setters-and-dot-syntax.html</a>.</p>

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