extent<T extends Comparable<Object>> function

(T, T)? extent<T extends Comparable<Object>>(Iterable<T> iterable)

Returns the minimum and maximum values as a tuple. Returns null if the iterable is empty.

Implementation

(T, T)? extent<T extends Comparable<Object>>(Iterable<T> iterable) {
  final iterator = iterable.iterator;
  if (!iterator.moveNext()) return null;

  T minValue = iterator.current;
  T maxValue = iterator.current;

  while (iterator.moveNext()) {
    final current = iterator.current;
    if (current.compareTo(minValue) < 0) {
      minValue = current;
    }
    if (current.compareTo(maxValue) > 0) {
      maxValue = current;
    }
  }
  return (minValue, maxValue);
}