For what I understand from those helpers, I think I've made it clear, and
of cause, thank you very much =)
As a summary, I generate this ideas .
-> is using in OO like functions, passing object proterties into a OO
function.
=> is using in a hash, and it is also implies a comma.
just like %foo = ("NAME", "CONNIE", "SURNAME", "CHAN")
is equal to %foo = ("NAME" => "CONNIE", "SURNAME" => "CHAN")
However, the second one is more readiable, as this is much *looks like a
pair*.
For "automatically quote the LHS if it is only a single word word - provided
it
doesn't contain certain characters (lke +-/*$%& etc)" :
First, LHS is "left hand side", and it is the *key* also. the meaning of
this is
%foo = (mine name=> Connie) is also a valid declaration, becuase there is
no meningful(for perl) bare chars. inside "mine name", and "Connie" is a
single
string without space. So we can skip those quote punc. BUT, this cannot be
done
if we use a comma like %foo = (mine name, Connie) Anyway, I still like to
quote it =)
Am I right ? If not, please give me some corrections , and thanks to all
helpers.
have a nice day
Connie
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, January 28, 2002 12:09 PM
Subject: Re:What's the different between -> and => ?
> > The big arrow is used in place of a ',' (comma). Now,
> > I just read in the latest Learning Perl that this is
> > global (i.e..: you can replace ANY comma with it, but
> > I may have misunderstood, have to re-read that again),
>
> >>>
> Almost, the following is valid:
>
> my $couple = join " & " => qw(Husband Wife);
>
> however, you'll note swapping the big arrow for a comma
> doesn't quite work for a hash:
>
> my %hash = ( big city, 'New York',
> Little City, 'Mayberru'
> );
>
> >>The special property of the => is to automatically quote
> >>the LHS if it is only a single word word - provided it
> >>doesn't contain certain characters (lke +-/*$%& etc) that
> >>make it look like an EXPR (expression). Then it *may*
> >>be evaluted rather than simply being quoted.
> >>>>>
>
>
> Please explain what you meant in the above paragraph :)
>
> --
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
--
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
