On Wed, Sep 23, 2009 at 08:08:47PM -0400, Chas. Owens wrote:
> On Wed, Sep 23, 2009 at 19:16, Mike McClain <mike.j...@nethere.com> wrote:
> > On Tue, Sep 22, 2009 at 05:09:26AM -0400, Shawn H Corey wrote:
> >> Roman Makurin wrote:
> > Does anyone know of a case where one of these expressions would fail?
<snip>
>
> Both the a and g cases only work because the assignment provides
> scalar context. Failure to recognize this may cause you to write
>
<snip>
>
> which results in either an error (if farr returns an even number), or
> worse, a very odd hash:
>
<snip>
>
> The solution is to force scalar context with scalar:
>
<snip>
>
> Of course, the best solution is to make farr context aware with the
> poorly named [wantarray][1]:
>
<snip>
>
> sub farr {
> my @a = qw/k l m/;
> return wantarray ? @a : scalar @a;
> }
>
<snip>
>
> [1] : http://perldoc.perl.org/functions/wantarray.html
>
> --
> Chas. Owens
> wonkden.net
> The most important skill a programmer can have is the ability to read.
Thanks Chas.
You make a really great teacher.
Mike
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