none method

bool none([
  1. bool test(
    1. E element
    )?
])

Returns true if the collection has no elements.

If test is provided it returns true if no elements pass the given test.

Implementation

bool none([bool Function(E element)? test]) {
  for (final element in this) {
    if (test == null) return false;
    if (test.call(element)) return false;
  }

  return true;
}