Hi Shawn,
I hope it's OK that I CC the list on it.
On Monday 12 Apr 2010 15:37:02 Shawn H Corey wrote:
> Shlomi Fish wrote:
> > {{{
> > my $hash = shift;
> > }}}
>
> Always put the array after a shift:
>
> my $hash = shift @_;
>
Well, you don't need to in this case as <<shift;>> inside a subroutine already
shifts out of @_ by default. We've already been there:
http://www.nntp.perl.org/group/perl.beginners/2010/03/msg111825.html
Maybe you haven't read my response or Bob McConnell's response to mine.
> > You should always say <<"STOPHTML" <<'STOPHTML' <<`STOPHTML` etc. with
> > explicit quotes depending on what you say. Otherwise, you may not be sure
> > that it's doing the right thing (nor will your readers). See Perl Best
> > Practices for more information.
>
> Why does putting the quotes in make this "best" practice but always
> putting the array name after a shift not?
Because people often don't know for sure what is the right way, and confuse
it. On the other hand, people don't normally think that "shift;" will shift
out of @ARGV when inside a subroutine (because they can tell they are inside a
subroutine, and because normally you should extract arguments out of @_ at the
beginning.), or think that it will shift out of the invalid @_ when in global
scope. It's not very possible to confuse the two, and furthermore complex
cases like using either of them repetitively in a loop should be avoided in
favour of using Getopt::Long, named arguments, etc.
Regards,
Shlomi Fish
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