//	- (void)appendBytes:(const void *)bytes length:(NSUInteger)length

	NSString *myString = @"testing";
	NSUInteger number = 5;

	NSMutableData *myData;

	[myData appendBytes: &myString length: number];

	NSLog (@"%@", myData);

//---------------------

//	- (void)appendData:(NSData *)otherData

	NSData *myData;

	NSMutableData *test;

	[test appendData: myData];

	NSLog (@"%@", test);

//---------------------

//	- (void)replaceBytesInRange:(NSRange)range withBytes:(const void *)bytes

	NSMutableData *myData = [NSMutableData dataWithCapacity: 4];

	NSString *myString = @"test";
	NSRange myRange = {0, 2};

	[myData replaceBytesInRange: myRange withBytes: &myString];

	NSLog (@"%@", myData);