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Thread-Topic: [RFC] Global functions any() and all() on iterables
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Date: Sat, 6 Feb 2021 15:00:43 +0000
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Subject: Re: [RFC] Global functions any() and all() on iterables
From: tysonandre775@hotmail.com (tyson andre)

Hi internals,=0A=
=0A=
> I've created an RFC for https://wiki.php.net/rfc/any_all_on_iterable=0A=
> =0A=
> This was proposed 2 days ago in https://externals.io/message/111711 with =
some interest=0A=
> ("Proposal: Adding functions any(iterable $input, ?callable $cb =3D null,=
 int $use_flags=3D0) and all(...)")=0A=
>=0A=
> - The $use_flags parameter was removed=0A=
>=0A=
> The primitives any() and all() are a common part of many programming lang=
uages and help in avoiding verbosity or unnecessary abstractions.=0A=
>=0A=
> -=A0https://hackage.haskell.org/package/base-4.14.0.0/docs/Prelude.html#v=
:any=0A=
> -=A0https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Glo=
bal_Objects/Array/some=0A=
> -=A0https://docs.python.org/3/library/functions.html#all=0A=
> -=A0https://docs.oracle.com/javase/8/docs/api/java/util/stream/Stream.htm=
l#allMatch-java.util.function.Predicate-=0A=
> =0A=
> For example, the following code could be shortened significantly=0A=
> =0A=
> ```=0A=
> // Old version=0A=
> $satisifies_predicate =3D false;=0A=
> foreach ($item_list as $item) {=0A=
> =A0=A0=A0 if (API::satisfiesCondition($item)) {=0A=
> =A0=A0=A0=A0=A0=A0=A0 $satisfies_predicate =3D true;=0A=
> =A0=A0=A0=A0=A0=A0=A0 break;=0A=
> =A0=A0=A0 }=0A=
> }=0A=
> if (!$satisfies_predicate) {=0A=
> =A0=A0=A0 throw new APIException("No matches found");=0A=
> }=0A=
> =0A=
> // New version is much shorter and readable=0A=
> if (!any($item_list, fn($item) =3D> API::satisfiesCondition($item))) {=0A=
> =A0=A0=A0 throw new APIException("No matches found");=0A=
> }=0A=
> ```=0A=
> =0A=
> That example doesn't have any suitable helpers already in the standard li=
brary.=0A=
> Using array_filter would unnecessarily call satisfiesCondition even after=
 the first item was found,=0A=
> and array_search doesn't take a callback.=0A=
> =0A=
> A proposed implementation is=A0https://github.com/php/php-src/pull/6053=
=A0- it takes similar flags and param orders to array_filter().=0A=
=0A=
The implementation and RFC https://wiki.php.net/rfc/any_all_on_iterable hav=
e been updated =0A=
after finishing the previous straw poll: https://wiki.php.net/rfc/any_all_o=
n_iterable_straw_poll_namespace=0A=
=0A=
This is now a vote on `PHP\iterable\any(iterable $input, ?callable $callbac=
k =3D null)` and `PHP\iterable\all(...)`.=0A=
=0A=
A secondary vote was added for choosing between `any`/`all` and `any_value`=
/`all_values` within `PHP\iterable`.=0A=
=0A=
I plan to start the vote on Monday.=0A=
=0A=
Any other feedback?=0A=
=0A=
Thanks,=0A=
- Tyson=0A=