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Date: Wed, 4 Mar 2009 14:42:34 +0300
Message-ID: <cd5680a20903040342v7da8db9bu467745fe829b5392@mail.gmail.com>
To: RQuadling@googlemail.com
Cc: PHP Internals List <internals@lists.php.net>
Content-Type: text/plain; charset=UTF-8
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Subject: Re: [PHP-DEV] Are there plans to allow anonymous functions as 
	callbacks?
From: indeyets@gmail.com (Alexey Zakhlestin)

On Wed, Mar 4, 2009 at 2:33 PM, Richard Quadling
<rquadling@googlemail.com> wrote:
> Hi.
>
> Quite a simple question (assuming I've got the terminology correct).
>
> Are there any plans to allow code like this (amended example taken
> from the array_map() documentation) ...
>
> <?php
> $a =3D array(1, 2, 3, 4, 5);
> $b =3D array_map(function($n){return($n * $n * $n)}, $a);
> print_r($b);
>
> For me, this is cleaner than having a use-once, namespace-polluting funct=
ion.
>
> Currently, this is producing a parse error.

It works. You have a typo. You need to put ";" after return (=E2=80=A6)

>
>
> A real alternative though would be to allow nested functions...
>
> <?php
> function cube_array($a) {
> =C2=A0function cube($n) {
> =C2=A0 =C2=A0return($n * $n * $n);
> =C2=A0}
> =C2=A0return array_map("cube", $a);
> }
> $a =3D array(1, 2, 3, 4, 5);
> $b =3D cube_array($a);
> print_r($b);
>
> Ideally, cube() would not be visible outside of cube_array(). Scoped func=
tions.
>
> Regards,
>
> Richard Quadling.
> --
> -----
> Richard Quadling
> Zend Certified Engineer : http://zend.com/zce.php?c=3DZEND002498&r=3D2134=
74731
> "Standing on the shoulders of some very clever giants!"
>
> --
> PHP Internals - PHP Runtime Development Mailing List
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>



--=20
Alexey Zakhlestin
http://www.milkfarmsoft.com/