dictionary.rb

class Dictionary
  attr_accessor :entries, :keywords
  def initialize()
    @entries = {}
    @keywords = []
  end
  
  def add(input)
    if input.is_a?(String)
      str = input
      @entries.merge!({str => nil})
      @keywords << str
    elsif input.is_a?(Hash)
      hsh = input
      @entries.merge! hsh
      @keywords += hsh.keys
    else
      raise "Not given a String or Hash"
    end
    @keywords.sort!
  end
  
  def include?(str)
    @keywords.include? str
  end
  
  def find(str)
    matches = {}
    @entries.each_with_index do |(key,value), index|
     if key.start_with?(str)
       matches.merge!({key => value})
     end
    end
    matches
  end
end