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

Hey Tyson, <http://ocramius.github.com/> On Sat, Aug 29, 2020 at 10:24 PM tyson andre <tysonandre775@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 > Would it make sense, instead of having a third boolean parameter (causing two parameters to be coupled together - already quite messy with existing array functions) for any() and all() to just detect if the given callback requires >1 parameter? That would make this much simpler. Marco Pivetta http://twitter.com/Ocramius http://ocramius.github.com/