At 12:49 20.05.2001 -0400, you wrote:
>Before I answer your question, I have to ask you to not use subroutine
>prototypes. 9 out of 10 Perl programmers use them incorrectly or don't
>know what they do.
>
>That being said, there are TWO really useful uses:
>
> sub my_map (&@) {
> my $code = shift;
> my @return;
> push @return, $code->($_) for @_;
> return @return;
> }
>
>That makes a function that allows for a naked block as its first argument:
>
> @results = my_map { $_ * 2 } (1,2,3,4);
>
>And the other use:
>
> sub my_push (\@@) {
> my $aref = shift;
> push @$aref, @_;
> }
>
>That allows you to send an array to the function BY REFERENCE, without
>typing the backslash when the function is called:
>
> my_push @foo, 1, 3, 5, 7;
I also like prototyping for its debugging and safety net behavior. It
kindly catches erroneous parameter passing.
Aaron Craig
Programming
iSoftitler.com
