Hello! I’m still finding my understanding of actual internals, so can only comment from a PHP developer perspective.
The “any” check is just to if anything in the itrerable passes the predicate, yeah?? What I find myself doing more often is wanting the first thing to satisfy the predicate - a “first” function, if you will. This could skip the step of iterating to find of something satisfies the predicate. Then iterating again to get one or more items that do satisfy it. Trying to think of a use case where I would want to check, but not do anything with that knowledge. Again, might not be completely following. Cheers, Josh > On Aug 29, 2020, at 3:39 PM, Alex <alexinbeij...@gmail.com> wrote: > > I like it! > > What is the $use_flags parameter for? > >> On Sat, Aug 29, 2020 at 10:24 PM tyson andre <tysonandre...@hotmail.com> >> wrote: >> Hi internals, >> The primitives any() and all() are a common part of many programming >> languages and help in avoiding verbosity or unnecessary abstractions. >> - >> 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- >> For example, the following code could be shortened significantly >> ``` >> // Old version >> $satisifes_predicate = false; >> foreach ($items as $item) { >> if (API::satisfiesCondition($item)) { >> $satisfies_predicate = true; >> break; >> } >> } >> if (!$satisfies_predicate) { >> throw new APIException("No matches found"); >> } >> // New version is much shorter and readable >> if (!any($items, fn($x) => API::satisfiesCondition($x))) { >> throw new APIException("No matches found"); >> } >> ``` >> That example doesn't have any suitable helpers already in the standard >> library. >> Using array_filter would unnecessarily call satisfiesCondition even after >> the first item was found, >> and array_search doesn't take a callback. >> A proposed implementation is https://github.com/php/php-src/pull/6053 - >> it takes similar flags and param orders to array_filter(). >> Previous discussion was in https://externals.io/message/103357#103373 >> - New contributors to projects wouldn't know about any() and all() if it >> was reimplemented with different semantics and only occasionally used >> (e.g. MyArrayUtil::any()) in various projects) >> - If this was provided only in userland, there'd be low adoption and code >> such as the first example would remain common. >> If the standard library provided it, then polyfills would as well, >> making cleaner code easier to write. >> Thanks, >> - Tyson >> -- >> PHP Internals - PHP Runtime Development Mailing List >> To unsubscribe, visit: https://www.php.net/unsub.php -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: https://www.php.net/unsub.php
