in reply to subroutine scalar string input
Hi robertw,
First of all, what you passed to the subroutrine is a scalar variable named $html not an html doc or html tag related string.
perlsub documentation, then gives a clear explanation of parameters passed to a subroutine as thus:
"The Perl model for function call and return values is simple: all functions are passed as parameters one single flat list of scalars, and all functions likewise return to their caller one single flat list of scalars. Any arrays or hashes in these call and return lists will collapse, losing their identities--but you may always use pass-by-reference instead to avoid this..."
So, within a subroutine the array @_ contains the parameters passed to that subroutine.
Thus this;
In case however, you intended to parse your imported html,my $html = "hello"; routine($html); routine2($html); sub routine { my $greetings = shift @_; print $greetings; ## print hello } #OR sub routine2 { my ($greetings) = @_; print $greetings; ## print hello }
you may consider using an html parser module like HTML::TokeParser or HTML::TreeBuilder.
Hope this helps.
If you show me, I'll remember.
if you involve me, I'll understand.
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Re^2: subroutine scalar string input
by robertw (Sexton) on Oct 21, 2012 at 20:03 UTC |