ASP.NET Web PDF Document Viewer/Editor Control Library

x = AllVowels.new x.each { |v| puts v }

Your AllVowels class contains a class array containing the vowels, and the instancelevel each method iterates through the class array @@vowels and yields to the code block supplied to each, passing in each vowel, using yield v. Let s get Enumerable involved:

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In 7, you sketched your storyboard across adjacent slides and sketched the hierarchy across levels. This process ensures that when you view the entire presentation in Slide Sorter view, you can see exactly how you manage the attention of your audience across time. Within that context, you now will focus on the individual slides to see how you can best manage your audience s attention in any particular moment of time, both visually and verbally. The best place to understand the design of your slides is in its complete context of screen and narration that is, in Notes Page view. As illustrated in Figure 8-2, the Notes Page view composition is built on three levels of information hierarchy.

class AllVowels include Enumerable @@vowels = %w{a e i o u} def each @@vowels.each { |v| yield v } end end

Now let s try to use those methods provided by Enumerable again. First let s get an AllVowels object:

name = raw_input('Please enter your name: ') or '<unknown>' In other words, if the return value from raw_input is true (not an empty string), it is assigned to name (nothing changes); otherwise, the default '<unknown>' is assigned to name. This sort of short-circuit logic can be used to implement the so-called ternary operator (or conditional operator), found in languages such as C and Java. For a thorough explanation, see Alex Martelli s recipe on the subject in the Python Cookbook (http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/ 52310).

8

Now you can call the methods upon x:

x.collect { |i| i + "x" }

The top of the hierarchy is the on-screen headline, which summarizes the point you make at this moment; the second level of the hierarchy is the on-screen graphic, which visually explains the headline; and the third level of the hierarchy is the off-screen narrative explanation in the notes area, which further explains both the headline and the visual element with your spoken words. When you work with graphics in this chapter, never forget the role of your narration. Not only does your voice provide a rich stream of information, but also you will use it during your presentation to emphasize the relative importance of information. For example, when you raise the volume of your voice, you indicate that what you are saying now is more important than what you said in a lower voice just before. Other classic techniques of public speaking can also be used to add emphasis, such as using intonation and pauses for effect. Although you will be working on individual slides in Normal view, it s a good idea to return frequently to Notes Page view during the process of adding graphics to view the slides in the context of their verbal narration. Keeping in mind how your voice will seamlessly integrate with the graphics you add to each slide, Figure 8-3 shows the built-in hierarchy of the default layout for your slides in Normal view. When you display any layout on the screen, you want your audience s eyes to go rst to the most important information on the slide the headline that summarizes your point. The headline communicates the topic clearly to the audience, reminds you as a speaker what you want to say, and keeps both parties focused on a speci c topic.

=> ["ax", "ex", "ix", "ox", "ux"]