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Let s all chant together the rule of memory management, If you get an object from an alloc, copy, or new, it has a retain count of 1, and you re responsible for releasing it. We ve covered alloc and new already, but we really haven t discussed copy yet. The copy method, of course, makes a copy of an object. The copy message tells an object to create a brand new object and to make the new object the same as the receiver.

Simple *objSimple = [[Simple alloc] init];

Unfortunately, you can t always express your objects information as property list classes. If we could express everything as dictionaries of arrays, we wouldn t need our own classes. Luckily, Cocoa has machinery for letting objects convert themselves into a format that can be saved to disk. Objects can encode their instance variables and other data into a chunk of data, which can be saved to disk. That chunk of data can be read back into memory later, and new objects can be created based on the saved data. This process is called encoding and decoding, or serialization and deserialization. If you remember our foray into Interface Builder in the last chapter, we dragged objects out of the library and into the window, and things were saved to the nib file. In other words, the NSWindow and NSTextField objects were serialized and saved to disk. When the nib file was loaded into memory when the program ran, the objects were deserialized, and new NSWindow and NSTextField objects were created and hooked together.

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[objSimple sayHello:@"James"];

13

When finished, you call its release method If no release method is found, the runtime moves up the classes inheritance hierarchy until it finds a release implementation

As you can probably guess, you can do the same thing with your own objects by adopting the NSCoding protocol. The protocol looks like this:

Allocate memory for new object and assign the object reference count of one Add receiver to autorelease pool Deallocate memory for an object with zero reference count Decrease object s reference count by one Increase object s reference count by one Returns the object as an id See documentation

some of the lessons I have learned as an entrepreneur and venture capitalist I will address alternative sources of financing, an overview of the venture capital (VC) market, targeting VCs, and how to effectively penetrate this insular group of private equity money managers It is important to know what you will need to best manage the fund-raising experience, what you should expect from a VC during this courtship, and ultimately what to expect if you decide to choose this path of funding To convey the VC process in a few pages is a formidable task There are many vehicles (VC being one of them) for an entrepreneur to start and grow her or his business It s crucial to consider one s overall objectives at the outset before embarking on the journey of starting your own company and raising VC funding Raising capital from a VC is a marriage, and getting a divorce is near impossible, so choose wisely!

@protocol NSCoding - (void) encodeWithCoder: (NSCoder *) aCoder; - (id) initWithCoder: (NSCoder *) aDecoder; @end

Table 3-1

As all classes extend NSObject, if no release instance is found, the runtime calls NSObject s release method

By adopting this protocol, you promise to implement both of these methods. When your object is asked to save itself, -encodeWithCoder: will be called. When your object is asked to load itself, -initWithCoder: will be called. So what s this coder thing An NSCoder is an abstract class that defines a bunch of useful methods for converting your objects into an NSData and back. You never create a new NSCoder because it doesn t actually do much. But there are a couple of concrete subclasses of NSCoder that you actually use to encode and decode your objects. We ll be using two of them, NSKeyedArchiver and NSKeyedUnarchiver. Probably the easiest way to understand these guys is with an example. You can look in the project 15.02 SimpleEncoding for all of the code. Let s start off with a simple class with some instance variables:

When starting a company, there are a variety of options in terms of financing Many entrepreneurs choose to grow their companies organically, also referred to as bootstrapping, meaning self-funding Often, in the initial stages, you might require a

[objSimple release];

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