From: Robert Klemme <shortcutter@...>
Date: 2009-03-26T20:54:54+09:00
Subject: Re: passing parameter

2009/3/26 Arun Kumar <arunkumar@innovaturelabs.com>:
> Hi,
> This is my code strip
>
>  contents.each do |content|
>                    #scanning the content using regexp to fetch the url
>                    url = content.scan(/(http:\/\/.*|https:\/\/.*)/i)

Two notes: #scan returns a potentially empty Array and not a single object.

And you can make the regexp simpler and more efficient at the same time

/https?:\/\/.*)/i

Note also that using ".*" is dangerous because depending on your input
this may match too much.

>                    data = Net::HTTP.get(URI.parse("#{url}"))

The construct "#{expr}" is better replaced by expr.to_s and in this
case, since url should be String you do not even need that.

>                    #extracting the feeds url from 'data' using 'regexp'
>                    xml = data.scan(/<link
> rel="alternate".*?href="(.*?xml|.*?rdf)"/i)
>                end
>
> Now what i want is to pass the 'xml' variable as a parameter to the next
> class but i'm not able to do that because the 'xml' variable is inside
> an array. Can anybody please tell me about how to do it.

Where is "xml in an array"?  The variable "xml" references an Array
because you use String#scan (see above). You can simply iterate that
Array as any other Array, too.  Where is the problem?

Cheers

robert

-- 
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