private void checkEnoughCapacity(int number) {
		// if (array.length - currentSize < number) {
		// expandVectorCapacityBy(number - array.length + currentSize);
		// }
		if (array.length - currentSize < number) {
			changeVectorCapacityBy(array.length);
		} else if (currentSize < array.length / 4) {
			changeVectorCapacityBy(-array.length / 2);
		}
	}