@Test public void testArrayPut(){

    assertEquals(asList(1,2,3,4,5), asList(Utils.arrayPut(new Integer[]{1, 2, 4, 5}, 2, 3)));
    assertEquals(asList(1,2,3,4,5), asList(Utils.arrayPut(new Integer[]{2, 3, 4, 5}, 0, 1)));
    assertEquals(asList(1,2,3,4,5), asList(Utils.arrayPut(new Integer[]{1, 2, 3, 4}, 4, 5)));
}