public static <E extends Comparable<E>> int binarySearch(E[] list, E key) {
		if (list.length >= 1) {
			int mid = list.length / 2;
			E[] half = null;
			if (key.compareTo(list[mid]) == 0) {
				return mid;
			}

			if (key.compareTo(list[mid]) > 0) {
				half = Arrays.copyOfRange(list, mid + 1, list.length);
			} else if (key.compareTo(list[mid]) < 0) {
				half = Arrays.copyOfRange(list, 0, mid);
			}

			return binarySearch(half, key);
		}

		return -1;
	}