Arrays with zero dimensions.

[David C. Plummer in disguise <DCP@SCRC-QUABBIN.ARPA>]

    Date: Thu, 06 Jun 85 15:30:40 EDT
    From: greek@DEC-HUDSON

    Is it really of cosmic importance that we allow dimensions of zero?
    We sure could invent a lot of baggage to handle it correctly, but...

We already have it:
  (array-dimensions "") => (0)
The problems presented so far only come up when the number of dimensions
is 2 or more.  My answer to that is that such arrays have legitimate
structure and are therefore meaningful.  Zero-dimensional arrays
likewise have legitimate structure, which is why I assume they were
included in the language.