static L<IntRange> intRangeChunks(int end, int chunkSize) {
  ret intRangeChunks(0, end, chunkSize);
}

static L<IntRange> intRangeChunks(int start, int end, int chunkSize) {
  new L<IntRange> l;
  int i = start;
  while (i < end) {
    l.add(IntRange(i, min(end, i+chunkSize)));
    i += chunkSize;
  }
  ret l;
}

// gratuitous convenience syntax for processing sound samples
static L<IntRange> intRangeChunks(short[] l, int chunkSize) { ret intRangeChunks(l(l), chunkSize); }

Began life as a copy of #1020604