# replaceRange method

1. @override

void replaceRange(

1. int start,
2. int end,
3. Iterable<E> newContents

)
override

Replaces a range of elements with the elements of `replacements`.

Removes the objects in the range from `start` to `end`, then inserts the elements of `replacements` at `start`.

    final numbers = <int>[1, 2, 3, 4, 5];
    final replacements = [6, 7];
    numbers.replaceRange(1, 4, replacements);
    print(numbers); // [1, 6, 7, 5]

The provided range, given by `start` and `end`, must be valid. A range from `start` to `end` is valid if 0 ≤ `start` ≤ `end` ≤ length. An empty range (with `end == start`) is valid.

The operation `list.replaceRange(start, end, replacements)` is roughly equivalent to:

    final numbers = <int>[1, 2, 3, 4, 5];
    numbers.removeRange(1, 4);
    final replacements = [6, 7];
    numbers.insertAll(1, replacements);
    print(numbers); // [1, 6, 7, 5]

but may be more efficient.

The list must be growable. This method does not work on fixed-length lists, even when `replacements` has the same number of elements as the replaced range. In that case use setRange instead.

## Implementation

    @override
    void replaceRange(int start, int end, Iterable<E> newContents) {
      _list.replaceRange(start, end, newContents);
    }