ASP.NET Web PDF Document Viewer/Editor Control Library

require 'yaml' require 'wordplay' # A basic implementation of a chatterbot class Bot attr_reader :name # Initializes the bot object, loads in the external YAML data # file and sets the bot's name. Raises an exception if # the data loading process fails. def initialize(options) @name = options[:name] || "Unnamed Bot" begin @data = YAML.load(File.open(options[:data_file]).read) rescue raise "Can't load bot data" end end # Returns a random greeting as specified in the bot's data file def greeting random_response(:greeting) end # Returns a random farewell message as specified in the bot's # data file def farewell random_response(:farewell) end # Responds to input text as given by a user def response_to(input)

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Reviewing the Call to Action and Key Point Slides for The Report Engaging Students with The Class Researching and Adding Available Graphics for The Class Reviewing the Act I Slides for The Class Reviewing the Call to Action and Key Point Slides for The Class Putting Your Clients at the Center in The Pitch Researching and Adding Available Graphics for The Pitch Reviewing the Act I Slides for The Pitch Reviewing the Call to Action and Key Point Slides for The Pitch Handling Objections to BBP

prepared_input = preprocess(input.downcase) sentence = best_sentence(prepared_input) reversed_sentence = WordPlay.switch_pronouns(sentence) responses = possible_responses(sentence) responses[rand(responses.length)] end

Tip As mentioned before, isinstance is best left unused most of the time. Relying on polymorphism is

private # Chooses a random response phrase from the :responses hash # and substitutes metadata into the phrase def random_response(key) random_index = rand(@data[:responses][key].length) @data[:responses][key][random_index].gsub(/\[name\]/, @name) end # Performs preprocessing tasks upon all input to the bot def preprocess(input) perform_substitutions(input) end # Substitutes words and phrases on supplied input as dictated by # the bot's :presubs data def perform_substitutions(input) @data[:presubs].each { |s| input.gsub!(s[0], s[1]) } input end # Using the single word keys from :responses, we search for the # sentence that uses the most of them, as it's likely to be the # 'best' sentence to parse def best_sentence(input) hot_words = @data[:responses].keys.select do |k| k.class == String && k =~ /^\w+$/ end WordPlay.best_sentence(input.sentences, hot_words) end

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# Using a supplied sentence, go through the bot's :responses # data set and collect together all phrases that could be # used as responses def possible_responses(sentence) responses = [] # Find all patterns to try to match against @data[:responses].keys.each do |pattern| next unless pattern.is_a (String) # For each pattern, see if the supplied sentence contains # a match. Remove substitution symbols (*) before checking. # Push all responses to the responses array. if sentence.match('\b' + pattern.gsub(/\*/, '') + '\b') # If the pattern contains substitution placeholders, # perform the substitutions if pattern.include ('*') responses << @data[:responses][pattern].collect do |phrase| # First, erase everything before the placeholder # leaving everything after it matching_section = sentence.sub(/^.*#{pattern}\s+/, '') # Then substitute the text after the placeholder, with # the pronouns switched phrase.sub('*', WordPlay.switch_pronouns(matching_section)) end else # No placeholders Just add the phrases to the array responses << @data[:responses][pattern] end end end # If there were no matches, add the default ones responses << @data[:responses][:default] if responses.empty # Flatten the blocks of responses to a flat array responses.flatten end end

This basic client accepts input from the user via the keyboard and prints the bot s responses back to the screen. This is the simplest form of client possible.

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require 'bot' bot = Bot.new(:name => ARGV[0], :data_file => ARGV[1]) puts bot.greeting while input = $stdin.gets and input.chomp != 'end' puts '>> ' + bot.response_to(input) end puts bot.farewell

As you can see, s is a (direct) member of the class SPAMFilter, but it is also an indirect member of Filter because SPAMFilter is a subclass of Filter. Another way of putting it is that all SPAMFilters are Filters. As you can see in the last example, isinstance also works with types, such as the string type (str). If you just want to find out which class an object belongs to, you can use the _ _class__ attribute: >>> s.__class__ <class __main__.SPAMFilter at 0x1707c0>

Use the client like so: