Rails spinoffs - Dec 2005 - Prototype Enumerable, Array and Hash Documentation

Hey guys,

I recently published an article documenting some of the more useful  
and interesting parts of Prototype''s Enumerable, Hash and Array
objects.
You can find it here:  http://encytemedia.com/blog/articles/ 
2005/12/07/prototype-meets-ruby-a-look-at-enumerable-array-and-hash

If you have any feedback or suggestions, fire away.

Cheers,
   -Justin Palmer

----------------------------------------------
Encytemedia.com
Professional User Interface Design for Rails Applications

Hi Justin, Thomas,

Thanks for the documentation.

I have one question though - how do I extract the value of any particular key
directly?

For eg:

Suppose I have a hash -
var h = $H({name: "john doe", email:
"john-Ch9RrZxMC0c@public.gmane.org", msg: "say hello to
me"});

h.keys(); //gives me name/email/msg
h.values() //gives me john doe/john-Ch9RrZxMC0c@public.gmane.org/say hello...

What if I want to know the value of name or email or msg?

Does it have something like -

h.value(name) or something? I want to be able to get the value using the key
without writing any loops.

Any help would be appreciated.

Thank you,
Mandy.

On 12/15/05, Maninder, Singh
<mandiv-W2hqgAdRMsX2eFz/2MeuCQ@public.gmane.org>
wrote:
> Suppose I have a hash -
> var h = $H({name: "john doe", email:
"john-Ch9RrZxMC0c@public.gmane.org", msg: "say hello to
me"});
>
> h.keys(); //gives me name/email/msg
> h.values() //gives me john doe/john-Ch9RrZxMC0c@public.gmane.org/say
hello...
>
> What if I want to know the value of name or email or msg?
>
> Does it have something like -
>
> h.value(name) or something? I want to be able to get the value using the
key without writing any loops.
>
h[''name''] ?

That works Nicolos! Thanks.

But, I was wondering that such support is already built in javascript.

Why did we have to wrap it in $H for this?

Thanks,
Mandy.

And so does -

h.name
h.email
h.msg

:)

-----Original Message-----
From: Maninder, Singh 
Sent: Thursday, December 15, 2005 5:31 PM
To:
''rails-spinoffs-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org''
Subject: RE: [Rails-spinoffs] [ANN] Prototype Enumerable,Array and Hash
Documentation


That works Nicolos! Thanks.

But, I was wondering that such support is already built in javascript.

Why did we have to wrap it in $H for this?

Thanks,
Mandy.

On 12/15/05, Maninder, Singh
<mandiv-W2hqgAdRMsX2eFz/2MeuCQ@public.gmane.org>
wrote:
> That works Nicolos! Thanks.
>
> But, I was wondering that such support is already built in javascript.
>
> Why did we have to wrap it in $H for this?
>
I use $H() only when I want to iterate over keys or value. Example
var options = {}
options[''v1''] = new Option(''v1'',
''v1'');
options[''v2''] = new Option(''v2'',
''v2'');
options[''v3''] = new Option(''v3'',
''v3'');

$H(options).keys().each(function(key) {
   doSomethingWith(key);
});

As I am new to prototype, I have not usefull examples... And maybe my
example can be accomplished in a more beautifull way.