dictionary

dictionary

class Dictionary
    def initialize
        @dict = {}
    end
    def entries
        @dict
    end
    
    def add(word, definition = nil)
        @dict[word] = definition
    end
    
    def include?(word)
        if @dict[word]
            true
        else
            false
        end
    end
    
    def empty?
        
    end
    
    def find(prefix)
      @dict.each do |word, definition|
        if (word.include? prefix) == false
          return nil
        else
          puts word + ": " + @dict[word]
        end
      end
    end
    
    def keywords
        @dict.keys.sort
    end
end

my_dictionary = Dictionary.new

my_dictionary.add("fish", "a swimming animal")
my_dictionary.add("fiend", "a bad person")
my_dictionary.add("apple")

puts my_dictionary.entries
puts
puts my_dictionary.keywords
puts
my_dictionary.find('nothing')
my_dictionary.find('fi')