class HMap

	attr_accessor :values
	@values

	def initialize
		@values = {}
	end

	def set(args)
		if @values[args[:key]].nil? or @values[args[:key]].empty?
			@values[args[:key]] = {args[:time] => args[:value]}
		else
			@values[args[:key]][args[:time]] = args[:value]
		end

	end

	def get(args)
		return nil if @values[args[:key]].nil?
		times = @values[args[:key]].keys
		val = @values[args[:key]][times[0]]
		times[1..-1].each do |t|
			if t > args[:time]
				break
			else
				val = @values[args[:key]][t]
			end
		end
		val
	end

	def to_string
		p @values
	end

end


# set( time: 0, key: "a", value: 1 )
# set( time: 2, key: "a", value: 2 )
# get( time: 1, key: "a" ) --> 1
# get( time: 3, key: "a" ) --> 2

# store values by key
# access the values by time

# i.e.:
	# h['a'][1] where [1] is time