class Object
	
	def takeValueForKey(value, key)
		send("#{key}=", value)
	end
	
	def valueForKey(key)
		send(key)
	end
	
	def takeValueForKeyPath(value, keyPath)
		keys = keyPath.split('.')
		lastKey = keys.pop
		target = self
		for key in keys
			target = target.valueForKey(key)
		end
		target.takeValueForKey(value, lastKey)
	end
	
	def valueForKeyPath(keyPath)
		keys = keyPath.split('.')
		result = self
		keys.each_index do |i|
			if keys[i] =~ /^[&](.*)/
				return result.send($1) {|val|
					val.valueForKeyPath(keys[i+1..-1].join('.'))
				}
			end	
			result = result.valueForKey keys[i]
		end
		result
	end
end

class Hash

	def takeValueForKey(value, key)
		self[key] = value
	end
	
	def valueForKey(key)
		self[key]
	end
end

class Array

	def takeValueForKey(value, key)
		self[key.to_i] = value
	end
	
	def valueForKey(key)
		self[key.to_i]
	end
end