R. Joseph Newton wrote:
> "...
> foreach(1..$total_elements){
> print "\t\[$_\] my $input[$_ - 1 ]\n";
> }
> ...Why did scalar $input in the foreach loop
> "works" without predeclaring it with my?" --Eri
>
> HI Eri,
>
> The my is probably not doing what you think it is. Otherwise
> it would constitute a redeclaration error. My guess is that
> you are creating an implicit anonymous scalar here:
> print "\t\[$_\] (my $Phantom_scalar = $input[$_ - 1 ])\n";
> You dont need to do this. Perl should interpolate the element
> directly.
I don't know if that's what he wants to do, but that definitely is not
what's happening. the characters "my" in the string are just characters.
Perl isn't doing anything with them.
>
> An underlying issue here is that you are using foreach to do
> the work of for. The for function is designed to work on
> indices. Use foreach to work on the elements directly,
> without reference to their indices.
> my $element;
> for (1..$total_elements){
> print "\t\[$_\] my $input[$_ - 1 ]\n";
> }
>From perldoc perlsyn,
The "foreach" keyword is actually a synonym for the "for"
keyword, so you can use "foreach" for readability or "for"
for brevity. (Or because the Bourne shell is more famil-
iar to you than csh, so writing "for" comes more natu-
rally.)
Personally, I never use foreach. (Nor csh, for that matter :~)
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