Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:104827
User-Agent: Cyrus-JMAP/3.1.5-976-g376b1f3-fmstable-20190314v3
Mime-Version: 1.0
Message-ID: <2fcc58f5-6776-4434-85e5-86222de71300@www.fastmail.com>
In-Reply-To: 
 <CAFMT4No7F-vBgSToHMVqu4oYz52oLXfAp7QbUzGQLmMiQYYY9g@mail.gmail.com>
References: <a70baca7-f0af-49de-9cf9-5421e42e0a0c@www.fastmail.com>
 <CAFMT4No7F-vBgSToHMVqu4oYz52oLXfAp7QbUzGQLmMiQYYY9g@mail.gmail.com>
Date: Wed, 20 Mar 2019 10:01:15 -0400
To: internals@lists.php.net
Content-Type: text/plain
Subject: Re: [PHP-DEV] RFC Draft: Comprehensions
From: larry@garfieldtech.com ("Larry Garfield")

On Tue, Mar 19, 2019, at 3:25 PM, Levi Morrison wrote:
> Today in the Dart world, Bob Nystrom published an article called
> [Making Dart a Better Language for UI][1]. I think it's an incredibly
> relevant article, since it is essentially about comprehensions, why
> they are a thing, as well as some of the design choices they made.
> 
> I think everyone in this thread ought to spend the 10-15 minutes reading it.
> 
>   [1]: 
> https://medium.com/dartlang/making-dart-a-better-language-for-ui-f1ccaf9f546c

I love that explanation, and the solution they come up with sounds very elegant.  There's only two caveats to it:

* Something along those lines in PHP would be even more work, and again I'm still looking for someone who can implement the design here; without a volunteer for that, this discussion is all hypothetical. :-(

* It doesn't seem like it would address the generator/iterator side, which is what my main target is.  Splatting an array into another array sounds highly useful, but the style there wouldn't (as far as I can tell) offer any solution for the lazy-evaluation case which, as Rowan just pointed out later in the thread, is still highly important and impossible to get from a greedy-evaluation construct.

--Larry Garfield