From: 7stud -- <bbxx789_05ss@...>
Date: 2009-03-10T18:18:30+09:00
Subject: Re: Regexp problem

Albert Schlef wrote:
> I want to extract an "id" parameter from the URL. I use the following
> code:
> 
>   url = "http://example.com/id=12345"
>   id = url[ /(?<=id=)(\d+)/ ]
>   puts id
> 
> But I get a SyntaxError telling me "undefined (?...) sequence".
> 
> Why?

url = "http://example.com/id=12345"

pieces = url.split("/")
id = pieces[-1].split("=")[1]
puts id

--output:--
12345

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