Larry wrote:
That's almost a reduce. Pity you have to include a variable.
But since rvalues are illegal on the left side of an assignment, we
*could* go as far as to say that
0 [+=] @b; # sum
1 [*=] @b; # product
'' [~=] @b; # cat
dwim into reduce operators rather than being illegal.
ETOOCLEVERBYHALF, IMHO. ;-)
I'd much rather see these common reductions be predefined C<sum>,
C<product>, and C<cat> methods of Array, and the more obscure
and bizarre reductions be explicitly marked with a C<reduce>:
my $countersequence = reduce {$^x-$^y}, @b
Damian
