plus method

List<num> plus(List<num> other)

Returns a new list consisting of the elements of this added to the elements of other.

Note: The operator + is already in use and concatenates two lists.

Implementation

List<num> plus(List<num> other) {
  mustHaveSameLength(other, operatorSymbol: '+');
  if (this is List<int> && other is List<int>) {
    return List<int>.generate(length, (i) => (this[i] as int) + other[i]);
  }
  if (other is List<double>) {
    return List<double>.generate(
      length,
      (i) => other[i] + this[i],
    );
  }
  if (this is List<double>) {
    return List<double>.generate(
        length, (i) => (this[i] as double) + other[i]);
  }
  return List<num>.generate(length, (i) => this[i] + other[i]);
}