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Re: draft-ietf-appsawg-json-pointer-07 - array index for end ofarray

"David J. Biesack" <David.Biesack@sas.com> Mon, 17 December 2012 14:02 UTC

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From: "David J. Biesack" <David.Biesack@sas.com>
To: Mark Nottingham <mnot@mnot.net>, ietf@ietf.org
Subject: Re: draft-ietf-appsawg-json-pointer-07 - array index for end ofarray
In-Reply-To: <6B4F2945-EC54-4171-92FF-3A88CEB27D23@mnot.net> (message from Mark Nottingham on Mon, 17 Dec 2012 11:33:41 +1100)
Date: Mon, 17 Dec 2012 09:02:10 -0500
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Mark Nottingham <mnot@mnot.net> writes:

>> Suggestion: allow negative numbers to indicate a position counted from the end of the array instead "array/-".
>> [some measure of complexity omitted here...]

> David,
>
> This was discussed in the Working Group, but it wasn't felt that the added complexity was worth it; there's a strong feeling that this spec should be as simple as possible.
>
> Cheers,

> --
> Mark Nottingham   http://www.mnot.net/

Understood - simplicity is a great Guiding Principle.

Might I suggest, however, using -1 instead of "-" to refer to the last item in an array, as this provides two benefits:

1) Allows for adding the complexity down the road in a compatible way, should there be need
2) Uniformity; i.e. always using integer values for referring to array elements.

Thanks for the consideration,
djb

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