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From: Dagfinn Ilmari Mannsåker <[email protected]>
To: Matthias van de Meent <[email protected]>
Cc: Artur Formella <[email protected]>
Cc: [email protected]
Subject: Re: Allowing additional commas between columns, and at the end of the SELECT clause
Date: Mon, 13 May 2024 13:28:19 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAEze2WhL_A9QO1xHQnEoYN1g5wsigqrL2+FLELcjFwaA-nP-Ug@mail.gmail.com>
References: <[email protected]>
	<CAEze2WhL_A9QO1xHQnEoYN1g5wsigqrL2+FLELcjFwaA-nP-Ug@mail.gmail.com>

Matthias van de Meent <[email protected]> writes:

> On Mon, 13 May 2024 at 10:42, Artur Formella <[email protected]> wrote:
>> Motivation:
>> Commas of this type are allowed in many programming languages, in some
>> it is even recommended to use them at the ends of lists or objects.
>
> Single trailing commas are a feature that's more and more common in
> languages, yes, but arbitrary excess commas is new to me. Could you
> provide some examples of popular languages which have that, as I can't
> think of any.

The only one I can think of is Perl, which I'm not sure counts as
popular any more.  JavaScript allows consecutive commas in array
literals, but they're not no-ops, they create empty array slots:

    ❯ js
    Welcome to Node.js v18.19.0.
    Type ".help" for more information.
    > [1,,2,,]
    [ 1, <1 empty item>, 2, <1 empty item> ]

- ilmari

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