Re: Proposal: Adding functions any(iterable $input, ?callable $cb = null, int $use_flags=0) and all(...)

Hi Josh Bruce, > The compelling feature here for me is the idea of an “array walker” that can be broken out > of. > > all() could be and() at which point this should be equivalent. Yes, you can write all($set, $predicate_fn) as !any($set, fn($x) => !$predicate_fn($x)) or some other common primitive such as and(), but as an end user or a reviewer of code, I really don't want to do the latter, which is why I proposed adding both of these. (also see below snippet) > Would there also be an xor() or equivalent?? one() or something?? > > If (count(array_filter($collection, “is_int”)) === 1) I don't plan to expand the scope of the RFC more - there are various features such as none() or exactly_n(int $n, $iterable, $callback) I'm also not proposing. RFC votes require a 2/3 majority and I'd think more would advocate doing one() in userland than any() > Here’s an implementation of each() I made that allows for breaking by the caller using a > passed by ref third argument in the > closure: https://github.com/8fold/php-shoop/blob/2a8b6fc41c545ff71690562ac2f35a12457b1514/src/Traits/EachImp.php - > I’ve since deprecated that functionality and not sure if I’ll be bringing that functionality > back because of frustrations and philosophical arguments with myself. :) Modifying a reference instead could be done to achieve the same result as setting a reference boolean in the cases where you needed to know what element it was. ``` if (any($values, function ($v) use (&$result) { if ($v->satisfiesPredicate()) {$result = $v; return true;} return false; }) ) { process($result); } ``` > Part of me wishes the “all()” and “any()” names were more descriptive of what’s going > on.  > > When I call for “all” in a database or some ORM, I *get* all - I’m not verifying “all > pass [a predicate]”. The naming is based on mathematical notation. - any($list, $predicate) "Determines whether any element of the iterable satisfies the predicate." - all($list, $predicate) "Determines whether all elements of the iterable satisfy the predicate." every() and some() are alternative names, but all()/any() are my preference and appear more commonly used elsewhere. - https://hackage.haskell.org/package/base-4.14.0.0/docs/Prelude.html#v:any - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/some - https://docs.python.org/3/library/functions.html#all - https://docs.oracle.com/javase/8/docs/api/java/util/stream/Stream.html#allMatch-java.util.function.Predicate- Thanks, - Tyson