RE: [PHP-DEV] Inline constructing/cloning and inline foreach listing
// Inline constructing:
$car = (new CarFactory())-makeCar();
// Inline cloning:
$tomorrow = (clone $today)-add($one_day);
Agreed. The fact that these expressions can't be wrapped in parentheses never
made any sense to me.
foreach ($arrays as list($e1, $e2, $e3)) { ...
Disagree. This feels very obtuse. I wouldn't expect this construct to work at
all, and even if it did, it is highly ambiguous (I.E. at first I thought you
were intending to grab 3 entries at a time, rather than extracting entries from
a second array).
John Crenshaw
Priacta, Inc.
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Re: [PHP-DEV] Inline constructing/cloning and inline foreach listing
On 7 June 2011 15:53, John Crenshaw johncrens...@priacta.com wrote:
foreach ($arrays as list($e1, $e2, $e3)) { ...
Disagree. This feels very obtuse. I wouldn't expect this construct to work
at all, and even if it did, it is highly ambiguous (I.E. at first I thought
you were intending to grab 3 entries at a time, rather than extracting
entries from a second array).
John Crenshaw
Priacta, Inc.
I don't understand what's ambiguous? For each iteration the foreach assigns
the current value to the variable $value specified as either as $key =
$value or as $value. The as keyword is simply a type of assignment
operator that assigns the current element to the right expression. Since PHP
has a special list() language construct for assignment it doesn't make
sense that list(...) = $something assignment would work but not
array($something) as list(...).
Grabbing 3 elements at a time is not logical at all. Why would the list
construct change how the foreach iterates?
Hannes
RE: [PHP-DEV] Inline constructing/cloning and inline foreach listing
From: Hannes Landeholm [mailto:landeh...@gmail.com]
Sent: Tuesday, June 07, 2011 11:50 AM
To: John Crenshaw; internals@lists.php.net
Subject: Re: [PHP-DEV] Inline constructing/cloning and inline foreach listing
On 7 June 2011 15:53, John Crenshaw
johncrens...@priacta.commailto:johncrens...@priacta.com wrote:
foreach ($arrays as list($e1, $e2, $e3)) { ...
Disagree. This feels very obtuse. I wouldn't expect this construct to work at
all, and even if it did, it is highly ambiguous (I.E. at first I thought you
were intending to grab 3 entries at a time, rather than extracting entries from
a second array).
John Crenshaw
Priacta, Inc.
I don't understand what's ambiguous? For each iteration the foreach assigns the
current value to the variable $value specified as either as $key = $value or
as $value. The as keyword is simply a type of assignment operator that
assigns the current element to the right expression. Since PHP has a special
list() language construct for assignment it doesn't make sense that
list(...) = $something assignment would work but not array($something) as
list(...).
Grabbing 3 elements at a time is not logical at all. Why would the list
construct change how the foreach iterates?
Hannes
The proposed meaning IS the more logical of the two, but that didn't stop me
from being confused when I first looked at the construction. Like I said, at
first glance I thought you were trying to iterate 3 at a time and I thought
why would we want the language to support THAT?
In any case, I'm just one person, and I don't entirely care for list() in the
first place so I'm probably biased, but this construct seems wrong to me.
John Crenshaw
Priacta, Inc.
