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Java Taskbook Level 10.4

Given some URL:

String url = "http://test.com/dir1/dir2/dir3/page.html";

Get a sequential set of folders from it:

{
	"/dir1/dir2/dir3/",
	"/dir2/dir3/",
	"/dir3/"
}

Given an arbitrary two-dimensional array:

{
	{11, 12, 13, 14, 15},
	{21, 22, 23, 24, 25},
	{31, 32, 33, 34, 35},
	{41, 42, 43, 44, 45},
	{51, 52, 53, 54, 55},
}

Get the array of elements of its secondary diagonal:

{
	15, 24, 33, 42, 51
}