From: Jay Pangmi <jaeezzy@...>
Date: 2008-10-16T22:31:12+09:00
Subject: Re: symbol confusions!!

Rob Biedenharn wrote:
> 
> Do you have a book like the Pickaxe?[1]  That will go into great
> detail on all the features that Ruby has to offer.
> 
> Briefly, however:
> 
> %w{} is a way to turn a list of words into an array:
>   %w{ one fish two fish }
>   => [ "one", "fish", "two", "fish" ]
> 
> %r{} is a regular expression literal.  %r{stuff.*} is like /stuff.*/
> without having to quote slashes (which is the main reason to see it
> used if you're matching a file path, for example)
> 
> %7d is probably a format specification from Kernel#sprintf or String#%
> meaning a decimal value in a minimum of 7 columns:
>    "%7d"%42
>    => "     42"
> 
> Oh, and "Kernel#sprintf" (generally, ClassName#method) means the
> instance method 'sprintf' from the class (or module) 'Kernel' (so, the
> '%' method from the String class).
> 
> -Rob
> 
> 
> [1] http://www.pragprog.com/titles/ruby/programming-ruby
> 
> 
> Rob Biedenharn    http://agileconsultingllc.com
> Rob@AgileConsultingLLC.com

Thanks Rob you made my life lot easier.. no I don't have that book I 
just have 'Agile Web Development with Rails 2nd Edt.' so, ruby is just a 
small part here and hence internet has been my only source.
Also I confusion about the use of slashes:
%r{(\d{1,2}):(\d{1,2}):(\d{4})}
whats the use of forward slash here
and the '+' sign below:
split(/[^0-9]+/)
Also I think I've seen the use of other words with '%' like %w but I 
don't remember which words in particular.

Thanks.
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