splice method

Iterable<T> splice(int start, int count, [ List<T>? insert ])

Removes count elements from the list starting at index start, and optionally inserts elements from insert at that position. Returns an Iterable of the removed elements.

Example usage:

void main() {
  List<int> numbers = [1, 2, 3, 4, 5];

  Iterable<int> removedElements = numbers.splice(1, 2);
  print(numbers); // Output: [1, 4, 5]
  print(removedElements); // Output: [2, 3]

  List<int> newElements = [10, 11, 12];
  Iterable<int> replacedElements = numbers.splice(1, 1, newElements);
  print(numbers); // Output: [1, 10, 11, 12, 5]
  print(replacedElements); // Output: [4]
}

Implementation

Iterable<T> splice(int start, int count, [List<T>? insert]) {
  final result = [...getRange(start, start + count)];
  replaceRange(start, start + count, insert ?? []);
  return result;
}