-------slice sparse array-------------
-- arr1
length: 2147483648
  2147483647: 100
-- arr2
-src
length: 4294967295
  4294967290: 100
  4294967291: 101
  4294967292: 102
  4294967293: 103
  4294967294: 104
  4294967295: 105
  4294967296: 106
  4294967297: 107
  4294967298: 108
  4294967299: 109
-sliced
length: 2147483647
  2147483642: 100
  2147483643: 101
  2147483644: 102
  2147483645: 103
  2147483646: 104
-------test prototype lookup-------------
200,101,202,203,204,105,106,207 ==> [0..0]: 
200,101,202,203,204,105,106,207 ==> [0..5]: 200,101,202,203,204
200,101,202,203,204,105,106,207 ==> [0..7]: 200,101,202,203,204,105,106
200,101,202,203,204,105,106,207 ==> [0..8]: 200,101,202,203,204,105,106,207
200,101,202,203,204,105,106,207 ==> [0..100]: 200,101,202,203,204,105,106,207
200,101,202,203,204,105,106,207 ==> [2..0]: 
200,101,202,203,204,105,106,207 ==> [2..5]: 202,203,204
200,101,202,203,204,105,106,207 ==> [2..7]: 202,203,204,105,106
200,101,202,203,204,105,106,207 ==> [2..8]: 202,203,204,105,106,207
200,101,202,203,204,105,106,207 ==> [2..100]: 202,203,204,105,106,207
200,101,202,203,204,105,106,207 ==> [7..0]: 
200,101,202,203,204,105,106,207 ==> [7..5]: 
200,101,202,203,204,105,106,207 ==> [7..7]: 
200,101,202,203,204,105,106,207 ==> [7..8]: 207
200,101,202,203,204,105,106,207 ==> [7..100]: 207
200,101,202,203,204,105,106,207 ==> [8..0]: 
200,101,202,203,204,105,106,207 ==> [8..5]: 
200,101,202,203,204,105,106,207 ==> [8..7]: 
200,101,202,203,204,105,106,207 ==> [8..8]: 
200,101,202,203,204,105,106,207 ==> [8..100]: