global special variable for array index?
Bruce Timberlake
brucet at onebox.com
Thu Apr 20 18:24:46 CDT 2000
~sdpm~
> Isn't there a global special variable for the list index when you're
> stepping through a list with a for (= foreach) statement? For
> example, I frequently have code like this:
>
> my $index;
> for my $element (@list)
> {
> # some processing on $element
> $index++;
> }
>
> It would be much easier if there were a global special variable (like
> $. for line numbers) so I don't have to keep track of $index myself.
First off, with that syntax you want to be doing a "foreach," not "for."
I don't think there is a special variable a la $_ for loop iteration
counting. I think what would work for you is:
$index = @list;
at the loop exit, which will set $index equal to the number of elements
in @list. E.g.,
my $index;
my $element;
@list = ("Larry", "Moe", "Curly");
foreach $element (@list) {
... # process $element
}
$index = @list; # $index now equals 3
Hope this helps!
Bruce
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~sdpm~
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