import static java.util.stream.Collectors.toMap;
import static java.lang.Math.min;
...
static Map<Integer, List<Integer>> partition(List<Integer> list, int pageSize) {
return IntStream.iterate(0, i -> i + pageSize)
.limit((list.size() + pageSize - 1) / pageSize)
.@R_454_2419@ed()
.collect(toMap(i -> i / pageSize,
i -> list.subList(i, min(i + pageSize, list.size()))));
}
return IntStream.range(0, (list.size() + pageSize - 1) / pageSize)
.@R_454_2419@ed()
.collect(toMap(i -> i ,
i -> list.subList(i * pageSize, min(pageSize * (i + 1), list.size()))));
0 / pageSize = 0 -> list.subList(0, min(0 + pageSize, 10)) = list.subList(0, 3);
3 / pageSize = 1 -> list.subList(3, min(3 + pageSize, 10)) = list.subList(3, 6);
6 / pageSize = 2 -> list.subList(6, min(6 + pageSize, 10)) = list.subList(6, 9);
9 / pageSize = 3 -> list.subList(9, min(9 + pageSize, 10)) = list.subList(6, 10);
^
|
this is the edge-case for the last sublist to
not be out of bounds
import static java.util.stream.Collectors.joining;
...
i -> list.subList(i, min(i + pageSize, list.size()))
.stream()
.map(Object::toString)
.collect(joining(","))
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