--- James Edward Gray II <[EMAIL PROTECTED]>
wrote:
> On Mar 8, 2004, at 1:24 PM, Stuart White wrote:
>
> > If I had a hash, I'd have to have a key and a
> value
> > though. I'm just looking for one or the other. I
> > suppose I could have key value pairs in the %SAN
> hash
> > like so:
>
> Perl hashes are pretty versatile. As Wags was
> saying, just stick each
> item in the hash under the unique key you want. The
> value doesn't
> matter at all. In the end, pull the keys and boom,
> problem solved.
> Let's look at an example:
>
> my @words = qw(dog cat dog lizard dog wombat dog);
> my %seen;
> foreach (@words) {
> $seen{$_}++;
> }
> my @words = keys %seen;
> print "@words\n"; # only prints one dog
>
> Hope that helps.
>
Conceptually, what you say the result is, is what I
want, thanks. When I read it though, without the
comment, I'd guess that the program would pair those
words like so:
dog:cat, dog:lizard, dog:wombat
with dog:lizard overwriting dog:cat, and dog:wombat
overwriting dog:lizard.
I seem to remember an example like this from the Llama
book.
However, absent my confusion, and given you're
correct, would this:
foreach (@words) {
> $seen{$_}++;
produce values at all to pair with the keys? I know
the value of the value doesn't matter, what I wrote as
Parker:san before could just as well been
Parker:valuePlaceHolder. but absent assgning a value,
is a number just assigned? This is the other bit of
my confusion.
Thanks.
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