From: "Sandor Szücs" <sandor.szuecs@...>
Date: 2008-08-26T18:15:54+09:00
Subject: Re: Still Query Continues

On 26.08.2008, at 06:48, Newb Newb wrote:
>
>   In this case the first one is valid image url because it has jpg  
> file
> extensions.so i need to display the image urls which has the
> .jpg,.png,gif extensions only..
>
>   Is this possible using Regular Expressions?

yes.

irb> a=%w{abc.jpg def ghi.png jkl.pngjpg mnp.bpng}
=> ["abc.jpg", "def", "ghi.png", "jkl.pngjpg", "mnp.bpng"]
irb> a.select {|w| w.match(/\.(png|jpg)?$/)}
=> ["abc.jpg", "ghi.png"]

>   Pls Help me out To Understand

If you want to understand more then you should read more  
documentation and
wikipedia on your topic. Also test carefully your expressions by an irb
session. Often it helps if you write a simple test to understand your  
problem.

In my opinion a great ressource for regular expressions is
http://www.regular-expressions.info

Maybe the wikibook with the topic ruby will help you in the future:
http://en.wikibooks.org/wiki/Ruby_Programming

Please read the fine manuals in the web before writing forum entries.

regards, Sandor Szücs
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