Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:111733
User-Agent: Cyrus-JMAP/3.3.0-232-g4bdb081-fm-20200825.002-g4bdb081a
Mime-Version: 1.0
Message-ID: <3e1a9076-ddb0-498e-8c13-242b87ec62c9@www.fastmail.com>
In-Reply-To: 
 <CAEsg9X1prQ6FdS9Aj7UEP_=jMoFF0hXczQzEWuN-b-Ddwa6wSg@mail.gmail.com>
References: 
 <CAEsg9X1prQ6FdS9Aj7UEP_=jMoFF0hXczQzEWuN-b-Ddwa6wSg@mail.gmail.com>
Date: Sun, 30 Aug 2020 18:54:30 -0500
To: "php internals" <internals@lists.php.net>
Content-Type: text/plain
Subject: Re: [PHP-DEV] array_reject() as counterpart of array_filter()
From: larry@garfieldtech.com ("Larry Garfield")

On Sun, Aug 30, 2020, at 9:38 AM, David Rodrigues wrote:
> Currently we have array_filter(), but sometimes we need an inverse function
> like array_reject().
> 
> array_reject('is_null', [ 1, 2, null, 3 ]); // [ 1, 2, 3 ]
> 
> It could be easily implemented with:
> 
> function array_reverse($fn, $arr) { return array_filter(fn($item) =>
> !$fn($item), $arr); }
> 
> Anyway, I think that It should be implemented by core, once that we have
> array_filter().

Any boolean function can be inverted with a simple ! in a short closure.  I don't really see a need to do that in C.

--Larry Garfield