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// include the latest version of the regex crate in your Cargo.toml
extern crate regex;

use regex::Regex;

fn main() {
  let regex = Regex::new(r#"<td>In Stock<\/td><td><input type="checkbox" name="bookId\[]" value="(.+)""#).unwrap();
  let string = "HTTP/1.1 200 OK
Date: Fri, 11 Sep 2015 15:39:48 GMT
Server: Apache
X-Pingback: http://www.myloadtest.com/xmlrpc.php
Link: <http://www.myloadtest.com/?p=216>; rel=shortlink
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Vary: Accept-Encoding,User-Agent
Content-Length: 8235
Content-Type: text/html; charset=UTF-8
Proxy-Connection: Keep-Alive
Connection: Keep-Alive
Content-Encoding: gzip


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<title>Correlation Challenge &#8211; My Load Test</title>

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					<header>
						<h2 class=\"entry-title\">Correlation Challenge</h2>
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				<h3>Step 3</h3>
				<p>Select all the books that are <em>in stock</em>, and press next.</p>

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						<th>Title</th>
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						<th>Select</th>
					</tr>
	<tr>
		<td><a href=\"http://www.amazon.com/Fundamentals-Performance-Engineering-firefighter-without/dp/1934474010\">Fundamentals of Performance Engineering</a></td>
		<td>Keith Smith, Bob Wescott</td>
		<td>Out of Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"3761804987b9709e8b09c4f134ef35cc973d\" /></td>
	</tr>
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		<td><a href=\"http://www.amazon.com/Software-Performance-Scalability-Quantitative-Engineering/dp/0470462531\">Software Performance and Scalability</a></td>
		<td>Henry H. Liu</td>
		<td>Out of Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"37616b5b7fa112c1b395fc6e4eea63722b19\" /></td>
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		<td><a href=\"http://www.amazon.com/Web-Performance-Tuning-OReilly-Internet/dp/059600172X\">Web Performance Tuning</a></td>
		<td>Patrick Killelea</td>
		<td>Out of Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"37612f4d1c1a342a51bef1326de9c88d226a\" /></td>
	</tr>
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		<td><a href=\"http://www.amazon.com/Art-Capacity-Planning-Scaling-Resources/dp/0596518579\">The Art of Capacity Planning</a></td>
		<td>John Allspaw</td>
		<td>Out of Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"376194acde8a661f319e8348261421971310\" /></td>
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		<td><a href=\"http://www.amazon.com/NET-Performance-Testing-Optimization-Complete/dp/1906434409\">.NET Performance Testing and Optimization</a></td>
		<td>Paul Glavich, Chris Farrell</td>
		<td>Out of Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"3761443df13bf05f1b2fa1664d06af01731d\" /></td>
	</tr>
		<tr>
		<td><a href=\"http://www.amazon.com/Practical-Performance-Analyst-Neil-Gunther/dp/059512674X\">The Practical Performance Analyst</a></td>
		<td>Neil Gunther</td>
		<td>Out of Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"376114e688ad0b2a746c8087e0ccf44a4c20\" /></td>
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		<td><a href=\"http://www.amazon.com/Integrated-Approach-Performance-Testing-Practitioners/dp/1591407850/\">Integrated Approach to Web Performance Testing</a></td>
		<td>B. M. Subraya</td>
		<td>Out of Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"37614e962b42835918912b5eeb2db8b3217f\" /></td>
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		<td><a href=\"http://www.amazon.com/Performance-Testing-Guidance-Web-Applications/dp/0735625700\">Performance Testing Guidance for Web Applications</a></td>
		<td>J.D. Meier, Carlos Farre, Prashant Bansode, Scott Barber, Dennis Rea</td>
		<td>In Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"37615fe6ff3dfb8b410774a9ac519da79f8c\" /></td>
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		<td><a href=\"http://www.amazon.com/Scalable-Internet-Architectures-Theo-Schlossnagle/dp/067232699X\">Scalable Internet Architectures</a></td>
		<td>Theo Schlossnagle</td>
		<td>In Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"37614397eff1747c99aaa425f129a8bd7339\" /></td>
	</tr>
		<tr>
		<td><a href=\"http://www.amazon.com/High-Performance-Web-Sites-Essential/dp/0596529309\">High Performance Web Sites</a></td>
		<td>Steve Souders</td>
		<td>Out of Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"3761893d16f12c7ddc491755083a857c421e\" /></td>
	</tr>
		<tr>
		<td><a href=\"http://www.amazon.com/Java-Performance-Tuning-Jack-Shirazi/dp/0596003773\">Java Performance Tuning</a></td>
		<td>Jack Shirazi</td>
		<td>Out of Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"3761441417e472ec3823d64c901e1b91b86a\" /></td>
	</tr>
		<tr>
		<td><a href=\"http://www.amazon.com/Art-Application-Performance-Testing-Programmers/dp/0596520662\">The Art of Application Performance Testing</a></td>
		<td>Ian Molyneaux</td>
		<td>In Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"37616181430fb9078c586008a936f1e2f6d5\" /></td>
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		<tr>
		<td><a href=\"http://www.amazon.com/Performance-Analysis-Websites-Stacy-Joines/dp/0201844540\">Performance Analysis for Java Websites</a></td>
		<td>Stacy Joines, Ruth Willenborg, Ken Hygh</td>
		<td>In Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"37615b65c8f37180ebefd2eb44d60e9f4bf3\" /></td>
	</tr>
		<tr>
		<td><a href=\"http://www.amazon.com/Apache-JMeter-practical-performance-measurement/dp/1847192955\">Apache JMeter</a></td>
		<td>Emily H. Halili</td>
		<td>In Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"3761b63f76b1b652b90bd22b6d3623cc11d9\" /></td>
	</tr>
		<tr>
		<td><a href=\"http://www.amazon.com/Scalability-Rules-Principles-Scaling-Sites/dp/0321753887\">Scalability Rules</a></td>
		<td>Martin L. Abbott, Michael T. Fisher</td>
		<td>Out of Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"376134099c0b5a9dc62f87f5690d9ddfa322\" /></td>
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		<tr>
		<td><a href=\"http://www.amazon.com/Building-Scalable-Web-Sites-Applications/dp/0596102356\">Building Scalable Web Sites</a></td>
		<td>Cal Henderson</td>
		<td>Out of Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"3761d23a39c5964a9cb410c68c1328d0ef70\" /></td>
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		<tr>
		<td><a href=\"http://www.amazon.com/Art-Scalability-Architecture-Organizations-Enterprise/dp/0137030428\">The Art of Scalability</a></td>
		<td>Martin L. Abbott, Michael T. Fisher</td>
		<td>Out of Stock</td>
		<td><input type=\"checkbox\" name=\"bookId[]\" value=\"3761c952f17f24a8260e1189d98d757b15fc\" /></td>
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 Served from: www.myloadtest.com @ 2015-09-12 01:39:49 by W3 Total Cache -->";
  
  // result will be a tuple containing the start and end indices for the first match in the string
  let result = regex.captures(string);
  
  let (start, end) = match result {
    Some((s, e)) => (s, e),
    None => {
        // ...
    }
  };
  
  
  println!("{}", &string[start, end]);
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Rust, please visit: https://docs.rs/regex/latest/regex/
Regular Expressions 101

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