description

# operator [] method

Number operator [] (int index)
override

Returns the object at the given `index` in the list or throws a RangeError if `index` is out of bounds.

## Implementation

    Number operator [](int index) {
      if (JS("bool", "# >>> 0 !== # || # >= #", index, index, index, length))
        throw new RangeError.index(index, this);
      return this.getItem(index);
    }