At 12:11 PM 8/25/00 -0600, Nathan Torkington wrote:
>[EMAIL PROTECTED] writes:
> > (1) The current
> >
> > $pdl->slice("0:$n,(0)");
> >
> > syntax sucks.
>
>Would:
>
> $pdl->[0:$n][0][:]
>
>suffice? I figure this would translate into something like:
>
> $pdl->subscript( 0, $n )
> ->subscript( 0 )
> ->subscript( undef, undef )
>
>That is, you can overload [] on objects but instead of being @{}
>as it currently is (where your overload sub returns an array ref)
>you get to handle the subscript operation yourself.
Either that or convince Larry to implement multidimensional arrays and
hashes in perl. (Which would be nice...)
> > (2) We see the need for a multidimensional, packed and typed array.
> >
> > The question is: should such an array type be part of perl6 or should it
> > be left to a module to implement such types?
>
>I vote module.
I vote... we wait and see! Can my vote win? :)
> > @arr = complex packed 0:10000; # some arbitrary syntax suggestion
> > $pdl = pdlwrap [10,10,100], @arr; # wrap this packed array to make a
> > [10,10,100] piddle
> > $arr[100] = 0;
> > print $pdl[0,0,1]; # print that same element
>
>I picture each piddle as an object:
>
> my Complex_Packed $arr;
> $arr->[100] = 0;
>
>I see the attraction of having an array appear as an array in Perl.
>The problem is that your arrays have new implementations. Currently
>in Perl there's tie() and overloading on objects.
The operative word in that last sentence is "Currently"...
>The problem is that you can tie() an array, but an object is a scalar.
>Also, there are many array operations (push, pop, etc) still not
>supported by tie. tie makes assumptions about arrays that are perhaps
>not valid with pdls.
Tie will have a more comprehensive implementation in perl 6, I expect. And
it may not be the method used to do this magic. (variable vtable functions
should be writable in perl)
>This will take much thought to get right.
Sure, but what doesn't? :-)
Dan
--------------------------------------"it's like this"-------------------
Dan Sugalski even samurai
[EMAIL PROTECTED] have teddy bears and even
teddy bears get drunk
