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Legal teams that have faced opponents using BBP in the courtroom have started to adopt the story themes and graphics that the other side uses For example, in trials against the pharmaceutical company that followed the Angleton verdict, the defense lawyers began using the CSI theme in their presentations When Mark faced them again, he used techniques to counter what the defense lawyers did, raising the bar even higher The same sorts of impacts are being felt in other professions as well, as BBP begins to transform the status quo for presenters everywhere As you consider applying BBP to your own presentations in this book, it might seem hard to imagine how to apply these types of techniques to your speci c profession.

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Kernel.puts "Hello, world!"

In many presentations of object-oriented programming, the order of these concepts is different. Encapsulation and inheritance are presented first, and then they are used to model real-world objects. That s all fine and dandy, but in my opinion, the most interesting feature of object-oriented programming is polymorphism. It is also the feature most people (in my experience) get confused by. Therefore I ll start with polymorphism, and show that this concept alone should be enough to make you like object-oriented programming.

Asking a dog to bark or asking an object its class is simple with Ruby. You simply refer to a class or object and follow it with a period and the name of the method, such as a_dog.bark, 2.class, or Dog.new. However, there are situations where you don t want to

But beyond lawyers and law rms, many people in many other professions and organizations are accomplishing signi cant results with this new approach, including presenters in major corporations, governmental agencies, universities, research rms, and nonpro t organizations Within these groups, people use BBP in a wide range of functions such as marketing, sales, training, and education In this book, you ll nd examples of presentations from different elds and for different purposes so that you can see how you can apply BBP to your own situation Everything Mark and many others have accomplished using the BBP approach is explained in detail in this book In 2, you ll learn the underpinnings of BBP along.

issue a simple command, but you want to associate some data with it too. The puts method is one example. Let s refer to it explicitly:

Kernel.puts "Hello, world!"

The term polymorphism is derived from a Greek word meaning having multiple forms Basically, that means that even if you don t know what kind of object a variable refers to, you may still be able to perform operations on it that will work differently depending on the type (or class) of the object For example, assume that you are creating an online payment system for a commercial Web site that sells food Your program receives a shopping cart of goods from another part of the system (or other similar systems that may be designed in the future) all you need to worry about is summing up the total and billing some credit card Your first thought may be to specify exactly how the goods must be represented when your program receives them For example, you may want to receive them as tuples, like this: ('SPAM', 2.

Hello, world!

1

With the puts method, you need to pass the data you want to print to the screen, which is why "Hello, world!" is placed after the method name. Although you can follow a method call directly with the data associated with that method, this is only a shortcut, and becomes cumbersome when you want to tie a number of methods together (as you ll do later in this chapter). To make the relationship between the method and the data entirely clear, the usual practice is to surround the data in brackets (parentheses) after the method call, like so:

Kernel.puts("Hello, world!")