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n level markov chain to randomly generate text
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| class String | |
| def blank? | |
| self.nil? || self.empty? | |
| end | |
| def present? | |
| !self.blank? | |
| end | |
| end | |
| class Array | |
| def blank? | |
| self.nil? || self.empty? | |
| end | |
| def present? | |
| !self.blank? | |
| end | |
| end | |
| class NilClass | |
| def blank? | |
| self.nil? || self.empty? | |
| end | |
| def present? | |
| !self.blank? | |
| end | |
| end | |
| class MarkovChain | |
| attr_accessor :memory_1, :memory_2, :memory_3 | |
| def initialize | |
| @memory_1 = {} | |
| @memory_2 = {} | |
| @memory_3 = {} | |
| end | |
| def train(path: ) | |
| tokens = File.read(path).split(" ") | |
| (0...tokens.length - 3).each do |i| | |
| one_key = tokens[i] | |
| one_value = tokens[i + 1] | |
| two_key = [one_key, one_value] | |
| two_value = tokens[i + 2] | |
| three_key = [one_key, one_value, two_value] | |
| three_value = tokens[i + 3] | |
| next if one_key.blank? || one_value.blank? || two_value.blank? || three_key.blank? || three_value.blank? | |
| @memory_1[one_key] = [] if @memory_1[one_key].blank? | |
| @memory_2[two_key] = [] if @memory_2[two_key].blank? | |
| @memory_3[three_key] = [] if @memory_3[three_key].blank? | |
| @memory_1[one_key] << one_value | |
| @memory_2[two_key] << two_value | |
| @memory_3[three_key] << three_value | |
| end | |
| end | |
| def level_0 | |
| result = @memory_1.keys.sample | |
| # puts "level 0: #{result}" | |
| result | |
| end | |
| def level_1(curr_state) | |
| return nil unless curr_state.present? | |
| curr_state = curr_state.first if curr_state.is_a?(Array) && curr_state.length == 1 | |
| values = @memory_1[curr_state] | |
| return nil if values.blank? | |
| result = values.sample | |
| # puts "level 1: #{result}" | |
| result | |
| end | |
| def level_2(curr_state) | |
| return nil unless curr_state.present? | |
| return nil unless curr_state.is_a?(Array) | |
| return nil unless curr_state.length == 2 | |
| values = @memory_2[curr_state] | |
| return nil if values.blank? | |
| result = values.sample | |
| # puts "Level 2: #{result}" | |
| result | |
| end | |
| def level_3(curr_state) | |
| return nil unless curr_state.present? | |
| return nil unless curr_state.is_a?(Array) | |
| return nil unless curr_state.length == 3 | |
| values = @memory_3[curr_state] | |
| return nil if values.blank? | |
| result = values.sample | |
| # puts "Level 3: #{result}" | |
| result | |
| end | |
| def next_word(curr_state="") | |
| level_1_key = curr_state.is_a?(Array) ? curr_state.last : curr_state | |
| level_2_key = (curr_state.is_a?(Array) && curr_state.length >= 2) ? curr_state[-2..-1] : curr_state | |
| level_3(curr_state) || level_2(level_2_key) || level_1(level_1_key) || level_0 | |
| end | |
| end | |
| def give_speech(markov_chain, length=100) | |
| result = "" | |
| last_word = markov_chain.level_0 | |
| result += markov_chain.level_1(last_word) + " " + last_word | |
| (0..length).each do |i| | |
| last_word = markov_chain.next_word(result.split(" ")[-3..-1]) | |
| result += " " + last_word | |
| end | |
| result | |
| end |
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