setRange method Null safety

void setRange(
  1. int start,
  2. int end,
  3. Iterable<E> iterable,
  4. [int skipCount = 0]
)
override

Writes some elements of iterable into a range of this list.

Copies the objects of iterable, skipping skipCount objects first, into the range from start, inclusive, to end, exclusive, of this list.

var list1 = [1, 2, 3, 4];
var list2 = [5, 6, 7, 8, 9];
// Copies the 4th and 5th items in list2 as the 2nd and 3rd items
// of list1.
list1.setRange(1, 3, list2, 3);
list1.join(', '); // '1, 8, 9, 4'

The provided range, given by start and end, must be valid. A range from start to end is valid if 0 ≤ start ≤ end ≤ length. An empty range (with end == start) is valid.

The iterable must have enough objects to fill the range from start to end after skipping skipCount objects.

If iterable is this list, the operation correctly copies the elements originally in the range from skipCount to skipCount + (end - start) to the range start to end, even if the two ranges overlap.

If iterable depends on this list in some other way, no guarantees are made.

Implementation

void setRange(int start, int end, Iterable<E> iterable, [int skipCount = 0]) {
  throw new UnsupportedError("Cannot setRange on immutable List.");
}