Larry --
> Simon Cozens writes:
> : Gregor N. Purdy:
> : > I was only involved in a small amount of 'key' discussion. FWIW, I
> : > would have thought the KEY_PAIR thingee was for (array) slice ranges,
> : > not multidimensional indexing...
> :
> : Then it's doubly mis-named, because KEY_PAIR holds a single key, not a
> : pair of anything, and KEY holds a bunch of KEY_PAIRs.
>
> I just think of multidimensionality as another "list of" dimension on
> top of the slices. Alternately, you can think of it as another
> dimension on each leaf that turns each scalar into a list. But the
> extra dimension has to sneak in there somewhere if we're to allow
> multidimensional slicing.
GP$0.02:
I think of slicing as a shortcut for map.
foo[1,2,3] === map { foo[$_] } (1,2,3)
I think of multidimensionality as arrays-of-arrays:
foo[1][2]
As for combining the two, I guess that would be
foo[1,2][3,4] =~= temp = map { foo[$_] } (1,2);
map { temp[$_] } (3,4)
or maybe even something like
=~= map { my $a = $_; map { foo[$a][$_] } (3,4) } (1,2)
(with an official frown for that temp variable. Some kind of
temp/scope trickery would be nice to avoid naming it when
writing nested constructs such as that)
I think of ranges as being lazy lists. Under flattening, they
remain generators and cause the the flattened list to also be lazy
so that when the ranges are encountered they DTRT. Optimization
might cause short ranges to explode so we don't have too much
time overhead for (1..5), while still avoiding space overhead for
(1...1000000).
Regards,
-- Gregor
____________________________________________________________________
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Gregor N. Purdy [EMAIL PROTECTED]
Focus Research, Inc. http://www.focusresearch.com/
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