gistfile1.txt

class Text

  def initialize
  end

  def file
    File.read('test-words')
  end

  def words
    #file.split(/([a-zA-Z0-9']+)/)
    #file.split(/([\w\S]+)/)
    file.scan(/[a-zA-Z0-9']+[^a-zA-Z0-9' ]+/)
  end

  def strip_word(word)
    #words.map {|word| word.gsub(/[^'0-9a-zA-Z]/i, '').downcase}
    word.gsub(/[^'0-9a-zA-Z]/i, '').downcase
  end

  def word_positions
    hash = Hash.new { |h,k| h[k] = [] }
    words.each_with_index do |word, index|
      hash[strip_word(word)] << index
    end
    require 'pry'
    binding.pry
    hash
  end

  def search(word, context)
    abort "ERROR: Context must be numeric" unless context.is_a?(Integer)
    abort "ERROR: Word must be a string." unless word.is_a?(String)

    result = []
    count = context*2

    word_positions[word].each do |pos|
      joined = words[(pos-context)..(pos+context)].join('')
      # Add back the missing ., so awful.
      joined.gsub!(/\. /, '.  ')
      result << joined
    end

    return result
  end

end