ASP.NET Web PDF Document Viewer/Editor Control Library

Now _ _inaccessible is inaccessible to the outside world, while it can still be used inside the class (for example, from accessible): >>> s = Secretive() >>> s.__inaccessible() Traceback (most recent call last): File "<pyshell#112>", line 1, in s.__inaccessible() AttributeError: Secretive instance has no attribute '__inaccessible' >>> s.accessible() The secret message is: Bet you can't see me... Although the double underscores are a bit strange, this seems like a standard private method, as found in other languages. What s not so standard is what actually happens. Inside a class definition, all names beginning with a double underscore are translated by adding a single underscore and the class name to the beginning: >>> Secretive._Secretive__inaccessible <unbound method Secretive.__inaccessible> If you know how this works behind the scenes, it is still possible to access private methods outside the class, even though you re not supposed to: >>> s._Secretive__inaccessible() Bet you can't see me... So, in short, you can t be sure that others won t access the methods and attributes of your objects, but this sort of name-mangling is a pretty strong signal that they shouldn t. If you don t want the name-mangling effect, but you still want to send a signal for other objects to stay away, you can use a single initial underscore. This is mostly just a convention, but has some practical effects. For example, names with an initial underscore aren t imported with starred imports (from module import *).

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These examples are more complex but prove that switch_pronouns can handle a few more complex situations with multiple pronouns. You can construct tests that cause switch_pronouns to fail:

def test_complex_pronouns assert_equal("yes, i rule", WordPlay.switch_pronouns("yes, you rule")) assert_equal("why do i cry", WordPlay.switch_pronouns("why do you cry")) end

8

These tests both fail, because they circumvent the trick you used to make sure that you is translated to me and I in the right situations. In these situations, they should become I, but because I isn t at the start of the sentence, they become me instead. It s important to notice that basic statements tend to work okay, whereas questions or more elaborate statements can fail. However, for your bot s purposes, the basic substitutions suffice. If you were to focus solely on producing an accurate language processor, you could use tests such as these to guide your development, and you ll probably use this technique when developing libraries to deal with edge cases such as these in your own projects.

Note Some languages support several degrees of privacy for its member variables (attributes). Java, for

Your nascent WordPlay library is complete, for now, and in a state that you can use its features to make your bot s source code simpler and easier to read. Next I ll present the source code for the library as is, as well as its associated unit test file. As an addition, the code also includes comments prior to each class and method definition, so that you can use RDoc to produce HTML documentation files, as covered in 8.

The Key Point layout (left) features both a distinctive split-screen layout with a solid color rectangle on the left and a photograph on the right. Like the Key Point slide layout, the Explanation slide layout (middle) is also a split-screen, except here the rectangle on the left is a lighter color. Last, instead of using a split-screen, the Detail slide layout (right) retains a horizontal shape with no color box. The gray bar at the bottom of the Explanation slide distinguishes it from the Key Point layout but also provides visual continuity across the Detail slides, which have the same gray bar with a navigational element a small clipboard with a number 1 indicating that this is within the section of the presentation that follows the rst Key Point slide. As shown in this example, next you will manually design custom layouts like these and apply them to the Key Point, Explanation, and Detail slides in your presentation.

Here s the code for the WordPlay library:

class WordPlay def self.switch_pronouns(text) text.gsub(/\b(I am|You are|I|You|Me|Your|My)\b/i) do |pronoun| case pronoun.downcase when "i" "you" when "you" "me" when "me" "you" when "i am" "you are" when "you are" "i am" when "your" "my" when "my" "your" end end.sub(/^me\b/i, 'i') end def self.best_sentence(sentences, desired_words) ranked_sentences = sentences.sort_by do |s| s.words.length - (s.downcase.words - desired_words).length end ranked_sentences.last end end

You can see the photos that were used in the example presentations in s 8 and 9 and obtain a license to use them in your own presentations by visiting a special area set up for BBP readers at the iStockphoto Web site at www.istockphoto.com/beyondbulletpoints.php.

Here s the test suite associated with the WordPlay library: