length property

@override int length

The number of elements in this.

Counting all elements may involve iterating through all elements and can therefore be slow. Some iterables have a more efficient way to find the number of elements. These must override the default implementation of length.

Implementation

@override
int get length {
  if (!step.isNegative) {
    int ret = ((stop - start + 1e-12) / step).ceil();
    return ret;
  } else {
    int ret = ((start - stop + 1e-12) / -step).ceil();
    return ret;
  }
}