.NET/Java PDF, Tiff, Barcode SDK Library

example, has four different levels. Python doesn t really have an equivalent privacy support, although single and double initial underscores do to some extent give you two levels of privacy.

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require 'test/unit' require 'wordplay' # Unit testing class for the WordPlay library class TestWordPlay < Test::Unit::TestCase # Test that multiple sentence blocks are split up into individual # words correctly def test_sentences assert_equal(["a", "b", "c d", "e f g"], "a. b. c d. e f g.".sentences) test_text = %q{Hello. This is a test of sentence separation. This is the end of the test.} assert_equal("This is the end of the test", test_text.sentences[2]) end # Test that sentences of words are split up into distinct words correctly def test_words assert_equal(%w{this is a test}, "this is a test".words) assert_equal(%w{these are mostly words}, "these are, mostly, words".words) end # Test that the correct sentence is chosen, given the input def test_sentence_choice assert_equal('This is a great test', WordPlay.best_sentence(['This is a test', 'This is another test', 'This is a great test'], %w{test great this})) assert_equal('This is a great test', WordPlay.best_sentence(['This is a great test'], %w{still the best})) end # Test that basic pronouns are switched by switch_pronouns def test_basic_pronouns assert_equal("i am a robot", WordPlay.switch_pronouns("you are a robot")) assert_equal("you are a person", WordPlay.switch_pronouns("i am a person"))

Although this book is printed in black and white, color is also something you need to consider when designing the layouts for the levels of your presentation. According to widely accepted principles of color theory, some individual colors such as red or highcontrast combinations of colors such as black and white call attention to themselves before others. With that in mind, you might choose a black ll color for the rectangle to contrast with the white background on the Key Point slides because you want the eye to go rst to these slides out of all the slides. You might then choose beige for the Explanation slides and then leave the Detail slides plain white. Or you could choose red for the Key Point, blue for the Explanation, and white for the Detail slide layouts. Your choice of colors should always align with the hierarchy of your ideas. If you consider integrating your organization s colors into your custom layouts, be careful when you do that, because those colors might con ict with your goal of guiding the working memory of your audience. For example, you might use red in your company colors, but using a red element on your Explanation and Detail slide layouts will call attention to that element instead of the headline and the graphic, which will erode the way your slides are working to guide the attention of the audience.

assert_equal("i love you", WordPlay.switch_pronouns("you love me")) end # Test more complex sentence switches using switch_pronouns def test_mixed_pronouns assert_equal("you gave me life", WordPlay.switch_pronouns("i gave you life")) assert_equal("i am not what you are", WordPlay.switch_pronouns("you are not what i am")) end end

In the previous section you put together the WordPlay library to provide some features you knew that your bot would need, such as basic sentence and word separation. Now you can get on with the task of fleshing out the logic of the bot itself. You ll create the bot within a Bot class, allowing you to create multiple bot instances and assign them different names and datasets, and work with them separately. This is the cleanest structure, as it allows you to keep the bot s logic separated from the logic of interacting with the bot. For example, if your finished Bot class exists in bot.rb, writing a Ruby program to allow a user to converse with the bot using the keyboard could be as simple as this:

8

Inheritance is another way of dealing with laziness (in the positive sense). Programmers want to avoid typing the same code more than once. We avoided that earlier by making functions, but now I will address a more subtle problem. What if you have a class already, and you want

require 'bot' bot = Bot.new(:name => "Botty", :data_file => "botty.bot") puts bot.greeting while input = gets and input.chomp != 'goodbye' puts ">> " + bot.response_to(input) end puts bot.farewell