operator []= method
Sets the value at the given index in the list to value.
The index must be a valid index of this list,
which means that index must be non-negative and
less than length.
Implementation
@override
void operator []=(int index, double value) {
if (index >= 0 && index < length) {
pointer[index] = value;
} else {
throw IndexError.withLength(index, length);
}
}