On Sun, Aug 30, 2020 at 6:13 PM tyson andre <[email protected]>
wrote:
> > I like this, but I do not like the flags. I don't think they're at all
> useful. A lot of the other discussion in the thread seems to be needlessly
> complicating it, too.
> >
> > all() and any() only need return booleans. Their callbacks only need
> return booleans. That's the point. first() makes sense to add, and it
> would return the first value that matches.
>
> What would first() return on failure? Would it throw (inefficient)?
> Would it set an optional output reference to distinguish between returning
> the value null from an iterable and the null from no matches?
>
If it took the default value as well it could return that. While it's
useful in itself it also would enable you to pass a marker object and check
the identity of that to know if no matches have been found:
$none = new stdClass;
$element = first($collection, fn($elt) => ...);
if ($element === $none) {
// nothing found
}
--
Best regards,
Bruce Weirdan mailto:
[email protected]
