Re: Bad scoping? Bad prototyping?

[Aaron Priven]

On Oct 9, 2006, at 10:35 AM, Helliwell, Kim wrote:

#!/bin/perl
sub1("Hello, ");

sub1("world\n");


sub sub2($str)

{
    print $str;
}

sub sub1($str)
{
    sub2($str)
}


Prototyping in perl does not do what you think it does. It does not  
turn your arguments into variables. All it does is supply a scalar or  
list context to entries in your argument list. It is not a useful  
feature for most people most of the time, and should be avoided.

http://library.n0i.net/programming/perl/articles/fm_prototypes/

Arguments to subs are always in the array @_

#!/bin/perl
use warnings;
use strict;
# no Top::Posting;

sub1('Hello, ');
sub1("world\n");

sub sub2 {
  my $str = shift; # implicitly uses @_
  print $str;
}

sub sub1 {
   my $str = shift;
   sub2($str)
}

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