Hi,
Mike, the use of "in" as `for ($var in $object) {};` could be the
subject for another distinct RFC since it's doing something different
from the original proposal:
var_dump("PHP" in ["PHP", "C", "Java"]); // true
2015-01-20 10:41 GMT-03:00 Mike Willbanks <pen...@gmail.com>:
> Hello Pierre, Andrea and Niklas,
>
> On Mon, Jan 19, 2015 at 11:35 PM, Pierre Joye <pierre....@gmail.com> wrote:
>
>> On Tue, Jan 20, 2015 at 6:15 AM, Andrea Faulds <a...@ajf.me> wrote:
>> >> On 20 Jan 2015, at 03:30, Mike Willbanks <pen...@gmail.com> wrote:
>> >>
>> >> I am very familiar with the in operator. However, the implementation
>> >> would be incomplete without handling loops via the in operator. Many
>> >> people when seeing an in operator also think of JavaScript. In that
>> case
>> >> the in operator iterates over properties. As such in PHP we should be
>> able
>> >> to iterate over associative arrays should the syntax be added.
>> >>
>> https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...in
>> >
>> > Why? We already have foreach/as which does exactly that, and unlike JS
>> which added for/of, there’s nothing wrong with PHP’s foreach so we don’t
>> need support for a new symbol.
>>
>> Indeed, exactly same feature.
>
>
> It certainly is the same feature from the foreach perspective. I'm not
> against leaving it out, however, it would be much like the in operator thus
> providing some additional syntax sugar. Many people that often program in
> JavaScript are used to having:
> array.forEach(function()), for (property in object), etc.
>
> From my perspective it would seem like a hole in the implementation for it
> to be missing but that is also due to having such a split of time between
> the two languages. Take for instance python utilizing the same thing:
>
> for variable in expression:
> ... code
> ...
>
> as well as ruby:
>
> for variable [, variable ...] in expression [do]
> code
> end
>
> Ultimately, I would feel that having the in operator would also create the
> expectation that in PHP we would be able to achieve the following:
>
> for ($var in $array) {} and/or for ($var in $object) {};
>
> Certainly foreach is more rich but I believe based on other languages and
> paradigms that this would be something people would request and expect if
> the in operator was to make it into PHP 7.
>
> Regards,
>
> Mike
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