On Thu, Oct 11, 2001 at 08:06:15PM +0200, Angel Faus wrote:
>
> Maybe i should better explain myself with an example.
>
> @arr3 = @arr1[^i] + @arr2[^i] # also @arr[^i] = @arr1[^i] + @arr2[^i]
Hyper-operators do this just fine.
> @arr4 = $v * @arr1[^i]
> $sum =+ @arr1[^i]
> @lengths_array = @arr1[^i].length()
These can be done in Perl 5 easily enough with map or foreach:
@arr4 = map {$v * $_} @arr1
$sum += $_ foreach (@arr1)
@lengths_array = map { length } @arr1
> I turns out also that RFC's semantics allows much more powerful things
> like:
>
> @mat3 = @mat1[^i,^j] * @mat2[^j,^i]
That's more complicated, but doable. I'd personally be happier reading
the code if it used nested for loops....
I don't *dislike* the idea, I'm just pointing out that there's a lot
of it already in the language. Perhaps making map/foreach/grep more
flexible with some kind of adverbial modification would be more
effective (e.g. having a way to specify an incrementor variable or
the temporary variable for map would allow nested maps to be more
useful).
--
Aaron Sherman
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