From: Robert Dober <robert.dober@...>
Date: 2008-12-01T22:53:49+09:00
Subject: Re: Explanation on some code

On Mon, Dec 1, 2008 at 2:34 PM, Michael Albers
<registraties@concatenate.nl> wrote:
> Hi,
>
> Today i looked at ruby for the first time.
>
> I can't quite figure out what this code is. Could someone give me an
> explanation.
>
> FILES = {
>  'some_file.html' => [
>    'Some text',
>    'Some more text'
>  ],
>  'some_other_file.html' => [
>    'other text',
>    'And even more text'
>  ],
>  'yet_another_file.html' => [
>    ['Last text', 2]
>  ]
> }
>
> Thanks a lot.
> --
> Posted via http://www.ruby-forum.com/.
>
>
It is a hash (literally specified at the RHS of the equal sign)
assigned to a constant, FILES.
The hash syntax is like the following

hash ::= '{' key_value_pairs '}' | '{' '}';
key_value_pairs ::= key "=>" value;
key ::= value ::= expression

Your expressions are made of string literals and lists.
Nough said
fire up irb and type in some simple expressions like

'a'
{'a' => 42}
x = [1,2,3]
y=%w{a b c }
h={ :symbol => x, "string" => y}

HTH
Robert


-- 
Ne baisse jamais la tête, tu ne verrais plus les étoiles.

Robert Dober ;)