3 ms·

It that case, wouldn't it be better to return something other that `null` for no-result (an empty iterator? an empty list?)? That might be where Optional comes

It that case, wouldn't it be better to return something other that `null` for no-result (an empty iterator? an empty list?)? That might be where Optional comes in, but I'm still not sure why a new language feature is needed for that.

asdfaoeu 11y ago
A list has zero or more elements where as Optional is zero or one. The later case seems common enough in my experience to warrant an additional language feature
alkonaut 11y ago
Yes, the Optional<T> is a "0 or 1 result" type. It's little more than a list with max length 1.