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POHow does this Ruby app know to select the middle third of sentences?
 

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  1. POHow does this Ruby app know to select the middle third of sentences?
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    <p>I am currently following Beginning Ruby by Peter Cooper and have put together my first app, a text analyzer. However, whilst I understand all of the concepts and the way in which they work, I can't for the life of me understand how the app knows to select the middle third of sentences sorted by length from this line:</p> <pre><code>ideal_sentances = sentences_sorted.slice(one_third, one_third + 1) </code></pre> <p>I have included the whole app for context any help is much appreciated as so far everything is making sense.</p> <pre><code>#analyzer.rb --Text Analyzer stopwords = %w{the a by on for of are with just but and to the my I has some in do} lines = File.readlines(ARGV[0]) line_count = lines.size text = lines.join #Count the characters character_count = text.length character_count_nospaces = text.gsub(/\s+/, '').length #Count the words, sentances, and paragraphs word_count = text.split.length paragraph_count = text.split(/\n\n/).length sentence_count = text.split(/\.|\?|!/).length #Make a list of words in the text that aren't stop words, #count them, and work out the percentage of non-stop words #against all words all_words = text.scan(/\w+/) good_words = all_words.select {|word| !stopwords.include?(word)} good_percentage = ((good_words.length.to_f / all_words.length.to_f)*100).to_i #Summarize the text by cherry picking some choice sentances sentances = text.gsub(/\s+/, ' ').strip.split(/\.|\?|!/) sentances_sorted = sentences.sort_by { |sentence| sentance.length } one_third = sentences_sorted.length / 3 ideal_sentances = sentences_sorted.slice(one_third, one_third + 1) ideal_sentances = ideal_sentences.select{ |sentence| sentence =~ /is|are/ } #Give analysis back to user puts "#{line_count} lines" puts "#{character_count} characters" puts "#{character_count_nospaces} characters excluding spaces" puts "#{word_count} words" puts "#{paragraph_count} paragraphs" puts "#{sentence_count} sentences" puts "#{sentence_count / paragraph_count} sentences per paragraph (average)" puts "#{word_count / sentence_count} words per sentence (average)" puts "#{good_percentage}% of words are non-fluff words" puts "Summary:\n\n" + ideal_sentences.join(". ") puts "-- End of analysis." </code></pre> <p>Obviously I am a beginner so plain English would help enormously, cheers. </p>
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    1. COI don't understand the question. Please post the result that you're getting and the result that you're expecting.
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