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As you learned in 7, photographs are a good t for these most important slides because they connect at an emotional level and are more memorable than text. Because these photos have the same style and are an aesthetic match with the audience, they present an especially distinctive impression that drives the story visually through the storyboard. Notice that the original sketch of the third Key Point slide in Figure 8-20 (lower right) was of a customer satisfaction survey. There were no graphics in the database search that matched the sketch, so the nal slide in Figure 8-21 (lower right) uses a picture of a stock chart instead to illustrate results in the headline. You won t always nd the perfect graphics to match your sketches, and when that is the case, improvise and nd the best match you can within your budget.

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The first thing this code does is to enter the Fixnum class, so you can define methods and perform actions within it. Next you make an alias from the addition operator/method (+) to a new method called old_plus. This is so you can still use the normal addition feature, though with a different name. Next you redefine (or override ) the + method and return 5 if the current number is 2 and the number you re adding to the current number is also 2. Otherwise, you simply call old_plus (the original addition function) with the supplied argument. This means that 2 + 2 now equals 5, but all other addition is performed correctly. You can redefine nearly any method within Ruby. This can make testing essential because you (or another developer) might incorporate changes that affect classes and objects being used elsewhere within your program. Testing is covered in s 8 and 12.

It s possible to change the visibility of methods within Ruby classes in one of three ways. Methods can be public (callable by any scope within the program), private (callable only within the scope of the instance the methods exist upon), and protected (callable by any object of the same class). Full details about method visibility are available in 6. To encapsulate methods as public, private, or protected, you can use two different techniques. Using the words public, private, and protected within a class definition causes the methods defined thereafter to be encapsulated in the respective fashion:

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class MyClass def public_method end private def private_method1 end def private_method2 end protected def protected_method end end

where somelist is your list. For an explanation of what this really means, see the section about join in 3.

You can also explicitly set methods to be encapsulated in one way or another, but only after you ve first defined them. For example:

organize your ideas in a priority and a sequence that helps people to pay attention to and remember the information you re providing. Before you move on to the next major step in the BBP approach storyboarding your script read through the following 10 tips to nd ideas that might improve your story template.

class MyClass def public_method end def private_method1 end def private_method2 end def protected_method end public :public_method

Declarations such as this should come after you define the methods, as otherwise Ruby won t know what you re referring to.

With your story template in hand, you can rest assured that you have a focused tale to tell at your next presentation. When you re comfortable with the basics of completing your template, try improvising on the concept using these 10 tips.

As everything is an object in Ruby, all forms of data represented within Ruby are also objects, just of varying classes. Therefore, some Ruby developers will try to correct you if you refer to types rather than classes, although this is merely pedantry. In this section we ll take a quick look at some of the basic data classes in Ruby.

You can perform all the standard sequence operations on lists, such as indexing, slicing, concatenating, and multiplying; but the interesting thing about lists is that they can be modified. In this section, you see some of the ways you can change a list: item assignments, item deletion, slice assignments, and list methods. (Note that not all list methods actually change their list.)

Strings in Ruby are generally unexceptional, except for the object-oriented benefits you gain. Previously in this appendix we looked at how powerful classes and methods can be when working upon strings: