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Your bot, like most others, is only interested in single-sentence inputs. Therefore, it s important to accept only the first sentence of each line of input. However, rather than specifically tear out the first sentence, you ll split the input into sentences and then choose the first one. The reason for this approach is to have a generic sentence-splitting method, rather than to create a unique solution for each case. You ll create a sentences method on Ruby s String class to keep the resulting code clean. You could create a class method within the WordPlay class, and use it like WordPlay.sentences(our_input), but it wouldn t feel as intuitive and as object-oriented as our_input.sentences, where sentences is a method of the String class.

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IN THIS CHAPTER, YOU WILL:

1. Note that these objects have to support addition with each other. So calling add(1, 'license') would not work.

You can test it easily:

%q{Hello. This is a test of basic sentence splitting. It even works over multiple lines.}.sentences

BE YOND BULLET POINTS (BBP) is making headlines because it gets dramatically better results than the standard bullet point approach that most people use with Microsoft Of ce PowerPoint . But it s no accident that BBP gets these results, because beneath the simple, clear, and compelling visual stories is a sophisticated foundation that determines everything you say, show, and do during a presentation. This chapter will explain why BBP works so well and why the conventional approach so often falls short of expectations.

["Hello", "This is a test of basic sentence splitting", "It even works over multiple lines"]

You also need your library to be able to split sentences into words. As with the sentences method, add a words method to the String class:

As you can see, the function also uses repr, but repr is one of the grand masters of polymorphism it works with anything. Let s see how: >>> The >>> The length_message('Fnord') length of 'Fnord' is 5 length_message([1, 2, 3]) length of [1, 2, 3] is 3

Learn why Beyond Bullet Points (BBP) gets the results it does. Review key research principles that every presenter needs to know. Compare the research principles with BBP and the conventional approach.

["This", "is", "a", "test", "of", "words'", "capabilities"]

You can test words in conjunction with sentences:

%q{Hello. This is a test of basic sentence splitting. It even works over multiple lines}.sentences[1].words[3]

Throughout its 20 years of existence, PowerPoint software has always offered the ability to work on your presentation in three key views: Normal view, Notes Page view, and Slide Sorter view. Although the rest of the PowerPoint features added since then are nice to have, these three views continue to be the bedrock tools you need to manage the images and narration of your presentations. See Also This chapter focuses on the three views you use when you prepare your slides in advance of a PowerPoint presentation. For more information about the two views you can use when you present your slides to an audience Slide Show view and Presenter view see Appendix B on the companion CD.

This test picks out the second sentence with sentences[1] and then the fourth word with words[3] remember, arrays are zero-based. (The splitting techniques covered in this section were also explained in 3.)

Many functions and operators are polymorphic probably most of yours will be, too, even if you don t intend them to be. Just by using polymorphic functions and operators, the polymorphism rubs off. In fact, virtually the only thing you can do to destroy this polymorphism is to do explicit type checking with functions such as type, isinstance, and issubclass. If you can, you really should avoid destroying polymorphism this way. What matters should be that an object acts the way you want, not whether it has the right type (or class) or not.

You can use the new methods, along with existing array methods, to extract sentences that match certain words, as in this example:

2

hot_words = %w{test ruby} my_string = "This is a test. Dull sentence here. Ruby is great. So is cake." my_string.sentences.find_all do |s| s.downcase.words.any { |word| hot_words.include (word) } end