TSa (Thomas Sandla▀) wrote:



You mean @a = [[1,2,3]]? Which is quite what you need for multi
dimensional arrays anyway @m = [[1,2],[3,4]] and here you use
of course @m[0][1] to pull out the 2. I'm not sure if this automatically
makes the array multi-dimensional to the type system though. That is
if @m[0,1] returns 2 as well or if it returns the list (1,2) or whatever.
Is @m[0..3] valid and what does it return? And what's the type of that
return value(s)? I can imagine many things ranging from a two element
array of refs to two element arrays up to a flattened list of 4 values.


@m[0,1] is an array slice of two elements, in this case two arrayrefs [1,2], and [3,4].
@m[0;1] is a multidim deref, referencing the 4.

@m[0..3] is valid, returning arrayref x 2, undef x 2.


Personally, I strongly believe that assigning an arrayref to an array should dereference the arrayref, and send that to the array. Otherwise, you get silly things like:

   $a = [1,2,3];
   @a = $a;
   say [EMAIL PROTECTED]; # 1

I would prefer to not have people be forced to write that as "@a = $a[];".

I don't see the big problem with having to double up the brackets to assign an arrayref to an array element.

-- Rod Adams



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