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Andrew Starks <> wrote:
> Roberto Ierusalimschy <> wrote:
> > I am not sure I understand what you are saying, but it is worth
> > mentioning that sequences can have non-integer keys. For instance,
> > {10, 20, 30, x=13, y=print} is a valid sequence in Lua.
> And so is...
> {10, 20, 30, x=13, y=print, [5] = 50}
> I would say that the above table contains a sequence. By that definition,
> any table with a non-nil value at index `1` contains a valid sequence.

On the one hand, I hear you. It ‘contains a sequence’, but I wouldn’t be
inclined to say that it *is* a valid sequence. The presence of integer keys
with a hole would prevent me from saying it is a valid sequence. Maybe
a bigger question is this: once the table looks like the last one here,
*why* call it a sequence? (I’m trying to imagine a case where it would make
sense to treat the first three items as a valid sequence and the rest
otherwise. I’m failing.)

We have not been faced with the need to satisfy someone else's
requirements, and for this freedom we are grateful.
    Dennis Ritchie and Ken Thompson, The UNIX Time-Sharing System