Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:90781
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: pass (pb1.pair.com: domain gmail.com designates 209.85.214.171 as permitted sender)
MIME-Version: 1.0
Sender: reeze.xia@gmail.com
In-Reply-To: <CAG1chopkNzMY4A=HGhZUbG3YE+s9T0_jvejjg_MV7ckXSWOUNA@mail.gmail.com>
References: <CAG1chop=iKCxOVc=TwgFmn-HPBpRz+h-wesG2bDW1B1uxNqv4A@mail.gmail.com>
 <CA+kxMuSvDT7OhDyCUqy8kMgTTKK48ugL4ZY1kzFknEDjAWdmsg@mail.gmail.com> <CAG1chopkNzMY4A=HGhZUbG3YE+s9T0_jvejjg_MV7ckXSWOUNA@mail.gmail.com>
Date: Thu, 21 Jan 2016 22:49:41 +0800
Message-ID: <CAG1choqq1i7pB4B4RSpzPPb1=rZ4MpNsGdfcPK-Y7edT46bDrg@mail.gmail.com>
To: Dan Ackroyd <danack@basereality.com>
Cc: "internals@lists.php.net" <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=001a1135fd069600530529d93736
Subject: Re: [PHP-DEV] [RFC][DISCUSSION] Allow default value in list() syntax
From: reeze@php.net (reeze)

--001a1135fd069600530529d93736
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

Bump this to continue discussion of this RFC (
https://wiki.php.net/rfc/list_default_value).

In case some of you didn't follow it before. This RFC propose to allow set
default value in list() assignment=EF=BC=9A

list($a =3D 'default value') =3D $arr;


On 10 November 2015 at 11:14, reeze <reeze@php.net> wrote:

> Hey Dan,
>
> On 9 November 2015 at 23:24, Dan Ackroyd <danack@basereality.com> wrote:
>
>> Hi Reeze,
>>
>> On 9 November 2015 at 13:35, reeze <reeze@php.net> wrote:
>> > Hi internals!
>> >
>> > I'd like to open a discussion on the RFC to allow set default values f=
or
>> > list() assignment:  https://wiki.php.net/rfc/list_default_value.
>> >
>> > What is your idea?
>>
>> I find the list construct to be quite magic already. Isn't it possible
>
> to get the affect that you want without adding anything to the core by
>> doing this:
>>
>> $defaults =3D ['default', 'default'];
>> $input =3D [1];
>>
>> list($a, $b) =3D array_replace($defaults, $input);
>>
>> I'd find that way easier to understand and explain to junior devs,
>>
>
> I saw the contrast way, it is more complex ;-). This seems like a trick.
> Many feature could also be remove,
> such as I refered in RFC:  Null coalesce "??" and Ternary Operator "?:"
>
> And the trick is trick. If you want to unpack nested array.
>
> list($a, list(list($b))) =3D $array
>
> Then you might need a new trick to do that.
>
> You know we have default for function declaration:
> function func($a=3D'default') {}; and almost all language have the featur=
e,
> it is easier to understand from my perspective.
>
>
>> compared to having more functionality added to the 'list' magicness.
>>
>> cheers
>> Dan
>>
>
>
>
> --
> Reeze Xia
> http://reeze.cn
>



--=20
Reeze Xia
http://reeze.cn

--001a1135fd069600530529d93736--