Onikoroshi

destinations = [
	{ priority: 1, destination_id: "A", trucks: 2, still_needed: 2 },
	{ priority: 2, destination_id: "B", trucks: 2, still_needed: 2 },
	{ priority: 3, destination_id: "C", trucks: 1, still_needed: 1 }
]

def next_destination
	# reset if everyone has been fully supplied
	if destinations.select{|dest| dest[:still_needed] == 0}.count == destinations.count
		destinations.map{|dest| dest[:still_needed] = dest[:trucks]}