On Tuesday 01 January 2013 22:57:49 Mark Miesfeld wrote:
> On Tue, Jan 1, 2013 at 8:26 PM, Leslie Turriff
<jlturr...@centurytel.net>wrote:
> > On Tuesday 01 January 2013 20:02:15 Rick McGuire wrote:
> > > On Tue, Jan 1, 2013 at 8:30 PM, Leslie Turriff
> >
> > <jlturr...@centurytel.net>wrote:
[snip]
> > Okay, let's try this again.
> >
> > Is a list index allowed to be an integer? A real number?
> > Non-numeric?
>
> I think Rick's point was that it doesn't matter. You can't generate a
> valid index, only the interpreter can. Whatever value it returns
> is guaranteed to be valid for the life of the list, and, by
> implication, guaranteed to be a valid index.
>
> Other than that, it is an allowed index if the interpreter returns it. An
> index is allowed if the interpreter returns it.
>
> Although I believe the indexes assigned are currently whole numbers, they
> are not guaranteed to always be whole numbers.
Okay. Rereading the description, I now understand that the indices are
generated by the interpreter, not by the programmer. Perhaps I'm dense, but
I didn't recognize that at first.
I presume then, that relative index references allowed for arrays (e.g.
array[a+2]) are not allowed for lists.
Leslie
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