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Reply-To: Levi Morrison <levi.morrison@datadoghq.com>
Date: Mon, 26 Apr 2021 08:16:26 -0600
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To: =?UTF-8?Q?Olle_H=C3=A4rstedt?= <olleharstedt@gmail.com>
Cc: Larry Garfield <larry@garfieldtech.com>, php internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] [RFC] Partial function application
From: internals@lists.php.net ("Levi Morrison via internals")

On Sun, Apr 25, 2021 at 1:51 PM Olle H=C3=A4rstedt <olleharstedt@gmail.com>=
 wrote:
>
> 2021-04-25 21:25 GMT+02:00, Larry Garfield <larry@garfieldtech.com>:
> > Greetings, Internalians!
> >
> > I would like to offer for your consideration another RFC, specifically
> > syntax for partial function application.
> >
> > https://wiki.php.net/rfc/partial_function_application
> >
> > It includes an implementation by Joe Watkins that is already about 95%
> > complete.  (There's some edge cases he's still sorting out, but all of =
the
> > typical cases should work already.)  Most of the design work comes from=
 Levi
> > Morrison and Paul Crovella.  I helped out with the tests, a few edge bi=
ts,
> > and general instigator/nudge. :-)
> >
> > Discuss.
> >
> > --
> >   Larry Garfield
> >   larry@garfieldtech.com
> >
> > --
> > PHP Internals - PHP Runtime Development Mailing List
> > To unsubscribe, visit: https://www.php.net/unsub.php
> >
> >
>
> Nice. :) Are there any other motivating use-cases besides pipe
> operator (that are relevant for web dev)?
>
> Olle
>
> --
> PHP Internals - PHP Runtime Development Mailing List
> To unsubscribe, visit: https://www.php.net/unsub.php
>

Yes, of course! PHP has many uses of `array_map`, `array_filter`, etc,
that take a callback as a parameter. It's hard to create good examples
on the spot, but here's an example, at least:

    array_filter($array, in_array(?, $haystack, strict: true))