fruit_colors = {}
fruit_colors["Raspberry"] = "red"
fruit_colors["Orange"] = "orange"
fruit_colors["Kiwi"] = "green"

fruit_colors.keys # ["Raspberry", "Orange", "Kiwi"]
fruit_colors.length # 3
fruit_colors.has_key?("Kiwi") # true

fruit_colors.delete("Raspberry")
fruit_colors # {"Orange"=>"orange", "Kiwi"=>"green"}