[Melbourne-pm] just my opinion
Toby Corkindale
tjc at wintrmute.net
Thu Sep 18 04:59:33 PDT 2008
On Thu, Sep 18, 2008 at 12:22:51PM +1000, Jacinta Richardson wrote:
> I agree that this is initially confusing. We explain it by saying that $
> means singular ie "this", "the" or "that", while @ and % are multiple, ie
> "these", "those".
>
> my $fish; # this fish.
> my @fruits; # those fruits
> my %facts; # those facts
>
> $fruits[0]; # _that_ fruit in position 0
> $fact{Jane}; # Jane's fact, or _the_ fact about Jane
[...]
> > some operators silently quote things and turn undef into 'undef'
> Do you have an example? I have never seen undef turned into 'undef'. That
> sounds like a bug. undef does get turned into '' or 0 (as appropriate to the
> operator) when used in some scalar contexts, but they are not true values
> whereas 'undef' would be. So
What would you expect the output of the following script to be?
--------
my %foo = (
undef => 'null',
foo => 'bar',
qux => 'qaaz'
);
print join(' ', @foo{qw(undef foo qux)}) . "\n";
--------
Cheers,
Toby
--
Turning and turning in the widening gyre/The falcon cannot hear the falconer;
Things fall apart, the centre cannot hold/Mere anarchy is loosed upon the world
(gpg --recv-key B1CCF88E)
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