addAll

    /**
     * Adds all elements from <>elements</> to the back of <>source</>
     *
     * @param source   The array we are adding to.
     * @param elements The elements we add.
     * @return A new array with the elements from both.
     * @author Dimitar Naydenov
     */
    public static int[] addAll(int[] source, int... elements) {

        int length = source.length + elements.length;
        int[] newArray = new int[length];
        int pos = 0;
        for (int element : source) {
            newArray[pos] = element;
            pos++;
        }
        for (int element : elements) {
            newArray[pos] = element;
            pos++;
        }
        return newArray;
    }