From: "Rüdiger Brahns" <ruedi@...>
Date: 2009-07-03T17:35:09+09:00
Subject: Re: ruby (mechanize , net/http)

Hello

If you didn't find it yet:

 >> str1 = 'http://...reports/switch_accounts.html?..'
=> "http://...reports/switch_accounts.html?.."
 >> re1 = %r{/switch_accounts.html/}
=> /\/switch_accounts.html\//
 >> str1.match re1
=> nil
 >> str2 = 'http://...reports/switch_accounts.html/?..'
=> "http://...reports/switch_accounts.html/?.."
 >> str2.match re1
=> #<MatchData:0xb7e1695c>
 >> re2 = %r{/switch_accounts.html\?}
=> /\/switch_accounts.html\?/
 >> str1.match re2
=> #<MatchData:0xb7e0c8d0>

I don't know mechanize, but str2 is an url your regex (re1) would match. 
re2 is the regex that matches your sample url.

Regards, R.