Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression

/
/
g

Test String

Code Generator

Generated Code

// 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#"(?<code1>class="relativetime">)(?<code2>.+)(?<code3><\/span>)"#).unwrap(); let string = "<!DOCTYPE html> <html> <head> <title>Newest Questions - Page 44 - Electrical Engineering Stack Exchange</title> <link rel=\"shortcut icon\" href=\"//cdn.sstatic.net/electronics/img/favicon.ico\"> <link rel=\"apple-touch-icon image_src\" href=\"//cdn.sstatic.net/electronics/img/apple-touch-icon.png\"> <link rel=\"search\" type=\"application/opensearchdescription+xml\" title=\"Electrical Engineering Stack Exchange\" href=\"/opensearch.xml\"> <script type=\"text/javascript\" src=\"//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js\"></script> <script type=\"text/javascript\" src=\"//cdn.sstatic.net/js/stub.js?v=5d233283ca8d\"></script> <link rel=\"stylesheet\" type=\"text/css\" href=\"//cdn.sstatic.net/electronics/all.css?v=672ddec9ce04\"> <script type=\"text/x-mathjax-config\"> MathJax.Hub.Config({\"HTML-CSS\": { preferredFont: \"TeX\", availableFonts: [\"STIX\",\"TeX\"], linebreaks: { automatic:true }, EqnChunk: (MathJax.Hub.Browser.isMobile ? 10 : 50) }, tex2jax: { inlineMath: [ [\"\\\\$\", \"\\\\$\"] ], displayMath: [ [\"$$\",\"$$\"], [\"\\\\[\", \"\\\\]\"] ], processEscapes: true, ignoreClass: \"tex2jax_ignore|dno\" }, TeX: { noUndefined: { attributes: { mathcolor: \"red\", mathbackground: \"#FFEEEE\", mathsize: \"90%\" } }, Macros: { href: \"{}\" } }, messageStyle: \"none\" }); </script> <script type=\"text/javascript\" src=\"http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS_HTML\"></script> <script type=\"text/javascript\"> StackExchange.ready(function () { StackExchange.realtime.init('sockets.ny.stackexchange.com'); StackExchange.realtime.subscribeToInboxNotifications(); StackExchange.realtime.subscribeToReputationNotifications('135'); }); </script> <script type=\"text/javascript\"> StackExchange.init({\"stackAuthUrl\":\"https://stackauth.com\",\"serverTime\":1377686850,\"styleCode\":true,\"enableUserHovercards\":true,\"site\":{\"name\":\"Electrical Engineering Stack Exchange\",\"description\":\"Q&A for electronics and electrical engineering professionals, students, and enthusiasts\",\"isNoticesTabEnabled\":true,\"recaptchaPublicKey\":\"6LdsB7sSAAAAAAzjgEF_Hd8vXv-C42sa_KyofaGR\",\"enableSocialMediaInSharePopup\":true},\"user\":{\"fkey\":\"964caaf8350dc8ae69af722ba29b4a1d\",\"isAnonymous\":true}}); StackExchange.using.setCacheBreakers({\"js/prettify-full.js\":\"6c261bebf56a\",\"js/moderator.js\":\"ed7a8238b2f8\",\"js/full-anon.js\":\"5f9bf5810297\",\"js/full.js\":\"027ac5ea264e\",\"js/wmd.js\":\"cff10cca4fd9\",\"js/third-party/jquery.autocomplete.min.js\":\"e5f01e97f7c3\",\"js/mobile.js\":\"82a79dbb7259\",\"js/help.js\":\"6e6623243cf6\",\"js/tageditor.js\":\"450c9e8426fc\",\"js/tageditornew.js\":\"b6c68ad4c7dd\",\"js/inline-tag-editing.js\":\"8e84e8a137f7\",\"js/revisions.js\":\"d3e781ee5528\",\"js/review.js\":\"947758ba83ea\",\"js/tagsuggestions.js\":\"aa48ef6154df\",\"js/post-validation.js\":\"bb996020492a\",\"js/explore-qlist.js\":\"1c5bbd79b562\",\"js/events.js\":\"27a33f0b2cad\"}); StackExchange.using.setCacheBreakers({\"js/mathjax-editing.js\":\"6da1b6cfe19f\",\"js/external-editor.js\":\"51c0a8d46d29\"}); </script> <script type=\"text/javascript\"> StackExchange.using(\"gps\", function() { StackExchange.gps.init(true); }); </script> <script type=\"text/javascript\"> StackExchange.ready(function () { $('#nav-tour').click(function () { StackExchange.using(\"gps\", function() { StackExchange.gps.track(\"aboutpage.click\", { aboutclick_location: \"headermain\" }, true); }); }); }); </script> </head> <body class=\"questions-page\"> <noscript><div id=\"noscript-padding\"></div></noscript> <div id=\"notify-container\"></div> <div id=\"overlay-header\"></div> <div id=\"custom-header\"></div> <div class=\"container\"> <div id=\"header\" class=headeranon> <div id=\"portalLink\"> <a class=\"genu\" href=\"http://stackexchange.com\" onclick=\"StackExchange.ready(function(){genuwine.click();});return false;\">Stack Exchange</a> </div> <div id=\"topbar\"> <div id=\"hlinks\"> <span id=\"hlinks-user\"></span> <span id=\"hlinks-nav\"> <a href=\"/users/login?returnurl=%2fquestions%3fpage%3d44%26sort%3dnewest\">sign up</a> <span class=\"lsep\">|</span> <a href=\"/users/login?returnurl=%2fquestions%3fpage%3d44%26sort%3dnewest\">log in</a> <span class=\"lsep\">|</span> </span> <span id=\"hlinks-custom\"></span> </div> <div id=\"hsearch\"> <form id=\"search\" action=\"/search\" method=\"get\" autocomplete=\"off\"> <div> <input autocomplete=\"off\" name=\"q\" class=\"textbox\" placeholder=\"search\" tabindex=\"1\" type=\"text\" maxlength=\"240\" size=\"28\" value=\"\"> </div> </form> </div> </div> <br class=\"cbt\"> <div id=\"hlogo\"> <a href=\"/\"> Electrical Engineering </a> </div> <div id=\"hmenus\"> <div class=\"nav mainnavs mainnavsanon\"> <ul> <li class=\"youarehere\"><a id=\"nav-questions\" href=\"/questions\">Questions</a></li> <li><a id=\"nav-tags\" href=\"/tags\">Tags</a></li> <li><a id=\"nav-tour\" href=\"/about\">Tour</a></li> <li><a id=\"nav-users\" href=\"/users\">Users</a></li> </ul> </div> <div class=\"nav askquestion\"> <ul> <li> <a id=\"nav-askquestion\" href=\"/questions/ask\">Ask Question</a> </li> </ul> </div> </div> </div> <div id=\"content\"> <div id=\"mainbar\"> <div class=\"subheader\"> <h1 id=\"h-all-questions\">All Questions</h1> <div id=\"tabs\"> <a class=\"youarehere\" href=\"/questions?sort=newest\" title=\"the most recently asked questions\">newest</a> <a href=\"/questions?sort=featured\" title=\"questions with open bounties\"><span class='bounty-indicator-tab'>3</span>featured</a> <a href=\"/questions?sort=frequent\" title=\"questions with the most links\">frequent</a> <a href=\"/questions?sort=votes\" title=\"questions with the most votes\">votes</a> <a href=\"/questions?sort=active\" title=\"questions that have recent activity\">active</a> <a href=\"/questions?sort=unanswered\" title=\"questions that have no upvoted answers\">unanswered</a> </div> </div> <div id=\"questions\"> <div class=\"question-summary\" id=\"question-summary-78358\"> <div class=\"statscontainer\"> <div class=\"statsarrow\"></div> <div class=\"stats\"> <div class=\"vote\"> <div class=\"votes\"> <span class=\"vote-count-post \"><strong>-1</strong></span> <div class=\"viewcount\">votes</div> </div> </div> <div class=\"status answered\"> <strong>1</strong>answer </div> </div> <div class=\"views \" title=\"34 views\"> 34 views </div> </div> <div class=\"summary\"> <h3><a href=\"/questions/78358/controlling-2-kw-230v-infra-red-short-wave-heaters-using-electronic-device\" class=\"question-hyperlink\">controlling 2 kw,230v- infra red short wave heaters using electronic device</a></h3> <div class=\"excerpt\"> i want to control infra red short wave heaters 230v,2kw, with some electronic device, it is an open loop system,where i want to give analog signal to heater from 0 to 100% . i cant take Thermocouple ... </div> <div class=\"tags t-voltage-regulator t-solid-state-relay t-dimming\"> <a href=\"/questions/tagged/voltage-regulator\" class=\"post-tag\" title=\"show questions tagged 'voltage-regulator'\" rel=\"tag\">voltage-regulator</a> <a href=\"/questions/tagged/solid-state-relay\" class=\"post-tag\" title=\"show questions tagged 'solid-state-relay'\" rel=\"tag\">solid-state-relay</a> <a href=\"/questions/tagged/dimming\" class=\"post-tag\" title=\"show questions tagged 'dimming'\" rel=\"tag\">dimming</a> </div> <div class=\"started fr\"> <div class=\"user-info \"> <div class=\"user-action-time\"> asked <span title=\"2013-08-08 10:06:07Z\" class=\"relativetime\">Aug 8 at 10:06</span> </div> <div class=\"user-gravatar32\"> <a href=\"/users/27245/user27245\"><div class=\"\"><img src=\"https://www.gravatar.com/avatar/73e6c66117a190c5cc03a90caf569aae?s=32&d=identicon&r=PG\" alt=\"\" width=\"32\" height=\"32\"></div></a> </div> <div class=\"user-details\"> <a href=\"/users/27245/user27245\">user27245</a><br> <span class=\"reputation-score\" title=\"reputation score\" dir=\"ltr\">1</span> </div> </div> </div> </div> </div> <div class=\"question-summary\" id=\"question-summary-78355\"> <div class=\"statscontainer\"> <div class=\"statsarrow\"></div> <div class=\"stats\"> <div class=\"vote\"> <div class=\"votes\"> <span class=\"vote-count-post \"><strong>0</strong></span> <div class=\"viewcount\">votes</div> </div> </div> <div class=\"status unanswered\"> <strong>0</strong>answers </div> </div> <div class=\"views \" title=\"47 views\"> 47 views </div> </div> <div class=\"summary\"> <h3><a href=\"/questions/78355/how-to-synchronize-internal-rtc-to-computer-time-and-date\" class=\"question-hyperlink\">how to synchronize internal RTC to computer time and date</a></h3> <div class=\"excerpt\"> i am using pic18f67k22 controller.i already configure and initialize internal RTC. But i want start RTC to computer time.so how i can synchronize pic RTC to computer.i have one computer application ... </div> <div class=\"tags t-microcontroller t-pic t-rtc\"> <a href=\"/questions/tagged/microcontroller\" class=\"post-tag\" title=\"show questions tagged 'microcontroller'\" rel=\"tag\">microcontroller</a> <a href=\"/questions/tagged/pic\" class=\"post-tag\" title=\"show questions tagged 'pic'\" rel=\"tag\">pic</a> <a href=\"/questions/tagged/rtc\" class=\"post-tag\" title=\"show questions tagged 'rtc'\" rel=\"tag\">rtc</a> </div> <div class=\"started fr\"> <div class=\"user-info \"> <div class=\"user-action-time\"> asked <span title=\"2013-08-08 08:52:58Z\" class=\"relativetime\">Aug 8 at 8:52</span> </div> <div class=\"user-gravatar32\"> <a href=\"/users/23841/shail-korat\"><div class=\"\"><img src=\"https://www.gravatar.com/avatar/649adca335821feacbd54299440806f2?s=32&d=identicon&r=PG\" alt=\"\" width=\"32\" height=\"32\"></div></a> </div> <div class=\"user-details\"> <a href=\"/users/23841/shail-korat\">shail korat</a><br> <span class=\"reputation-score\" title=\"reputation score\" dir=\"ltr\">23</span><span title=\"6 bronze badges\"><span class=\"badge3\"></span><span class=\"badgecount\">6</span></span> </div> </div> </div> </div> </div> <div class=\"question-summary\" id=\"question-summary-78353\"> <div class=\"statscontainer\"> <div class=\"statsarrow\"></div> <div class=\"stats\"> <div class=\"vote\"> <div class=\"votes\"> <span class=\"vote-count-post \"><strong>1</strong></span> <div class=\"viewcount\">vote</div> </div> </div> <div class=\"status answered-accepted\"> <strong>1</strong>answer </div> </div> <div class=\"views \" title=\"46 views\"> 46 views </div> </div> <div class=\"summary\"> <h3><a href=\"/questions/78353/spi-interfacing-using-serial-port-or-usb\" class=\"question-hyperlink\">SPI Interfacing using Serial Port or USB</a></h3> <div class=\"excerpt\"> I have a nRF24L01+ module from Nordic Semiconductors. It has SPI interface. My laptop has USB ports and I have a Serial Port (Using a USB-to-Serial_Port adapter). What is the best possible solution to ... </div> <div class=\"tags t-usb t-serial t-spi t-interface\"> <a href=\"/questions/tagged/usb\" class=\"post-tag\" title=\"show questions tagged 'usb'\" rel=\"tag\">usb</a> <a href=\"/questions/tagged/serial\" class=\"post-tag\" title=\"show questions tagged 'serial'\" rel=\"tag\">serial</a> <a href=\"/questions/tagged/spi\" class=\"post-tag\" title=\"show questions tagged 'spi'\" rel=\"tag\">spi</a> <a href=\"/questions/tagged/interface\" class=\"post-tag\" title=\"show questions tagged 'interface'\" rel=\"tag\">interface</a> </div> <div class=\"started fr\"> <div class=\"user-info \"> <div class=\"user-action-time\"> asked <span title=\"2013-08-08 08:32:08Z\" class=\"relativetime\">Aug 8 at 8:32</span> </div> <div class=\"user-gravatar32\"> <a href=\"/users/7329/subin-sebastian\"><div class=\"\"><img src=\"https://www.gravatar.com/avatar/b3b512420352799f21d1e7933b59b9ed?s=32&d=identicon&r=PG\" alt=\"\" width=\"32\" height=\"32\"></div></a> </div> <div class=\"user-details\"> <a href=\"/users/7329/subin-sebastian\">Subin Sebastian</a><br> <span class=\"reputation-score\" title=\"reputation score\" dir=\"ltr\">211</span><span title=\"1 silver badge\"><span class=\"badge2\"></span><span class=\"badgecount\">1</span></span><span title=\"7 bronze badges\"><span class=\"badge3\"></span><span class=\"badgecount\">7</span></span> </div> </div> </div> </div> </div> <div class=\"question-summary\" id=\"question-summary-78351\"> <div class=\"statscontainer\"> <div class=\"statsarrow\"></div> <div class=\"stats\"> <div class=\"vote\"> <div class=\"votes\"> <span class=\"vote-count-post \"><strong>2</strong></span> <div class=\"viewcount\">votes</div> </div> </div> <div class=\"status answered-accepted\"> <strong>2</strong>answers </div> </div> <div class=\"views \" title=\"54 views\"> 54 views </div> </div> <div class=\"summary\"> <h3><a href=\"/questions/78351/trouble-on-understanding-alu-2-bit-design\" class=\"question-hyperlink\">Trouble on understanding ALU 2-bit design</a></h3> <div class=\"excerpt\"> I'm new to this site and I'm pretty \"noobish\" to electrical engineering coming from a software engineering background I was hoping someone could help me understand this design a bit. I've highlighted ... </div> <div class=\"tags t-alu\"> <a href=\"/questions/tagged/alu\" class=\"post-tag\" title=\"show questions tagged 'alu'\" rel=\"tag\">alu</a> </div> <div class=\"started fr\"> <div class=\"user-info \"> <div class=\"user-action-time\"> asked <span title=\"2013-08-08 08:20:46Z\" class=\"relativetime\">Aug 8 at 8:20</span> </div> <div class=\"user-gravatar32\"> <a href=\"/users/27251/thecodemonsters\"><div class=\"\"><img src=\"https://www.gravatar.com/avatar/b02a007bf995a0986bd3c55d6b5bc3e6?s=32&d=identicon&r=PG\" alt=\"\" width=\"32\" height=\"32\"></div></a> </div> <div class=\"user-details\"> <a href=\"/users/27251/thecodemonsters\">theCodeMonsters</a><br> <span class=\"reputation-score\" title=\"reputation score\" dir=\"ltr\">13</span><span title=\"2 bronze badges\"><span class=\"badge3\"></span><span class=\"badgecount\">2</span></span> </div> </div> </div> </div> </div> <div class=\"question-summary\" id=\"question-summary-78348\"> <div class=\"statscontainer\"> <div class=\"statsarrow\"></div> <div class=\"stats\"> <div class=\"vote\"> <div class=\"votes\"> <span class=\"vote-count-post \"><strong>3</strong></span> <div class=\"viewcount\">votes</div> </div> </div> <div class=\"status answered\"> <strong>1</strong>answer </div> </div> <div class=\"views \" title=\"57 views\"> 57 views </div> </div> <div class=\"summary\"> <h3><a href=\"/questions/78348/small-max-5x5-mm-connector-panel-mount-for-asyncronous-serial-interface\" class=\"question-hyperlink\">Small (max 5x5 mm) connector, panel mount, for asyncronous serial interface?</a></h3> <div class=\"excerpt\"> I opened a small router and hooked up 2 wires on the PCB (to catch the serial data). That works fine. Now I'm looking for a way to make a small (tiny) connector in the enclosure, so for future use i ... </div> <div class=\"tags t-pcb t-connector t-cases t-mount\"> <a href=\"/questions/tagged/pcb\" class=\"post-tag\" title=\"show questions tagged 'pcb'\" rel=\"tag\">pcb</a> <a href=\"/questions/tagged/connector\" class=\"post-tag\" title=\"show questions tagged 'connector'\" rel=\"tag\">connector</a> <a href=\"/questions/tagged/cases\" class=\"post-tag\" title=\"show questions tagged 'cases'\" rel=\"tag\">cases</a> <a href=\"/questions/tagged/mount\" class=\"post-tag\" title=\"show questions tagged 'mount'\" rel=\"tag\">mount</a> </div> <div class=\"started fr\"> <div class=\"user-info \"> <div class=\"user-action-time\"> asked <span title=\"2013-08-08 07:20:56Z\" class=\"relativetime\">Aug 8 at 7:20</span> </div> <div class=\"user-gravatar32\"> <a href=\"/users/8524/rogier\"><div class=\"\"><img src=\"https://www.gravatar.com/avatar/181219cd20b8036ef8ec45b94aed6474?s=32&d=identicon&r=PG\" alt=\"\" width=\"32\" height=\"32\"></div></a> </div> <div class=\"user-details\"> <a href=\"/users/8524/rogier\">Rogier</a><br> <span class=\"reputation-score\" title=\"reputation score\" dir=\"ltr\">165</span><span title=\"6 bronze badges\"><span class=\"badge3\"></span><span class=\"badgecount\">6</span></span> </div> </div> </div> </div> </div> <div class=\"question-summary\" id=\"question-summary-78345\"> <div class=\"statscontainer\"> <div class=\"statsarrow\"></div> <div class=\"stats\"> <div class=\"vote\"> <div class=\"votes\"> <span class=\"vote-count-post \"><strong>4</strong></span> <div class=\"viewcount\">votes</div> </div> </div> <div class=\"status answered-accepted\"> <strong>1</strong>answer </div> </div> <div class=\"views \" title=\"69 views\"> 69 views </div> </div> <div class=\"summary\"> <h3><a href=\"/questions/78345/what-happened-to-the-to-3-package\" class=\"question-hyperlink\">What happened to the TO-3 package?</a></h3> <div class=\"excerpt\"> TO-3 used to be a common package for power transistors, but you don't see them much anymore. It can't be just because of SMT, TO-220 is still much in use. TO-3 has a much lower thermal resistance than ... </div> <div class=\"tags t-packages\"> <a href=\"/questions/tagged/packages\" class=\"post-tag\" title=\"show questions tagged 'packages'\" rel=\"tag\">packages</a> </div> <div class=\"started fr\"> <div class=\"user-info \"> <div class=\"user-action-time\"> asked <span title=\"2013-08-08 07:05:21Z\" class=\"relativetime\">Aug 8 at 7:05</span> </div> <div class=\"user-gravatar32\"> <a href=\"/users/27167/radagast\"><div class=\"\"><img src=\"https://www.gravatar.com/avatar/294b3e797acb485f50878567a54bfec8?s=32&d=identicon&r=PG\" alt=\"\" width=\"32\" height=\"32\"></div></a> </div> <div class=\"user-details\"> <a href=\"/users/27167/radagast\">radagast</a><br> <span class=\"reputation-score\" title=\"reputation score\" dir=\"ltr\">334</span><span title=\"1 silver badge\"><span class=\"badge2\"></span><span class=\"badgecount\">1</span></span><span title=\"11 bronze badges\"><span class=\"badge3\"></span><span class=\"badgecount\">11</span></span> </div> </div> </div> </div> </div> <div class=\"question-summary\" id=\"question-summary-78337\"> <div class=\"statscontainer\"> <div class=\"statsarrow\"></div> <div class=\"stats\"> <div class=\"vote\"> <div class=\"votes\"> <span class=\"vote-count-post \"><strong>16</strong></span> <div class=\"viewcount\">votes</div> </div> </div> <div class=\"status answered-accepted\"> <strong>2</strong>answers </div> </div> <div class=\"views \" title=\"431 views\"> 431 views </div> </div> <div class=\"summary\"> <h3><a href=\"/questions/78337/which-way-does-electricity-power-a-circuit\" class=\"question-hyperlink\">Which way does electricity power a circuit?</a></h3> <div class=\"excerpt\"> Working with some circuits this summer, I ran into what everyone eventually does: Current flows from + to - despite the electrons flowing (well, bumping into eachother) from - to +. I understand the ... </div> <div class=\"tags t-power-supply t-current t-analog\"> <a href=\"/questions/tagged/power-supply\" class=\"post-tag\" title=\"show questions tagged 'power-supply'\" rel=\"tag\">power-supply</a> <a href=\"/questions/tagged/current\" class=\"post-tag\" title=\"show questions tagged 'current'\" rel=\"tag\">current</a> <a href=\"/questions/tagged/analog\" class=\"post-tag\" title=\"show questions tagged 'analog'\" rel=\"tag\">analog</a> </div> <div class=\"started fr\"> <div class=\"user-info \"> <div class=\"user-action-time\"> asked <span title=\"2013-08-08 04:00:29Z\" class=\"relativetime\">Aug 8 at 4:00</span> </div> <div class=\"user-gravatar32\"> <a href=\"/users/27243/tom\"><div class=\"\"><img src=\"https://www.gravatar.com/avatar/bfc2bcb561dd6949178afc5306c1fb25?s=32&d=identicon&r=PG\" alt=\"\" width=\"32\" height=\"32\"></div></a> </div> <div class=\"user-details\"> <a href=\"/users/27243/tom\">Tom</a><br> <span class=\"reputation-score\" title=\"reputation score\" dir=\"ltr\">81</span><span title=\"4 bronze badges\"><span class=\"badge3\"></span><span class=\"badgecount\">4</span></span> </div> </div> </div> </div> </div> <div class=\"question-summary\" id=\"question-summary-78336\"> <div class=\"statscontainer\"> <div class=\"statsarrow\"></div> <div class=\"stats\"> <div class=\"vote\"> <div class=\"votes\"> <span class=\"vote-count-post \"><strong>1</strong></span> <div class=\"viewcount\">vote</div> </div> </div> <div class=\"status answered\"> <strong>2</strong>answers </div> </div> <div class=\"views \" title=\"115 views\"> 115 views </div> </div> <div class=\"summary\"> <h3><a href=\"/questions/78336/using-relay-with-microcontroller\" class=\"question-hyperlink\">Using Relay With Microcontroller</a></h3> <div class=\"excerpt\"> I have created a boost converter which boost 12v to 60v. I want to be able to pulse this voltage under water. I would like to have only the positive lead (Vout from boost) to come off the boost ... </div> <div class=\"tags t-microcontroller t-relay\"> <a href=\"/questions/tagged/microcontroller\" class=\"post-tag\" title=\"show questions tagged 'microcontroller'\" rel=\"tag\">microcontroller</a> <a href=\"/questions/tagged/relay\" class=\"post-tag\" title=\"show questions tagged 'relay'\" rel=\"tag\">relay</a> </div> <div class=\"started fr\"> <div class=\"user-info \"> <div class=\"user-action-time\"> asked <span title=\"2013-08-08 03:56:44Z\" class=\"relativetime\">Aug 8 at 3:56</span> </div> <div class=\"user-gravatar32\"> <a href=\"/users/27242/wallace\"><div class=\"\"><img src=\"https://www.gravatar.com/avatar/ea5a17f0b7d6efa25f118ade0a0db9d5?s=32&d=identicon&r=PG\" alt=\"\" width=\"32\" height=\"32\"></div></a> </div> <div class=\"user-details\"> <a href=\"/users/27242/wallace\">Wallace</a><br> <span class=\"reputation-score\" title=\"reputation score\" dir=\"ltr\">58</span><span title=\"7 bronze badges\"><span class=\"badge3\"></span><span class=\"badgecount\">7</span></span> </div> </div> </div> </div> </div> <div class=\"question-summary\" id=\"question-summary-78329\"> <div class=\"statscontainer\"> <div class=\"statsarrow\"></div> <div class=\"stats\"> <div class=\"vote\"> <div class=\"votes\"> <span class=\"vote-count-post \"><strong>0</strong></span> <div class=\"viewcount\">votes</div> </div> </div> <div class=\"status answered\"> <strong>2</strong>answers </div> </div> <div class=\"views \" title=\"48 views\"> 48 views </div> </div> <div class=\"summary\"> <h3><a href=\"/questions/78329/how-to-measure-the-current-from-ac-dc-supplier\" class=\"question-hyperlink\">how to measure the current from AC-DC supplier?</a></h3> <div class=\"excerpt\"> I started to learn the AC/DC circuit some times ago. I don't have much experience. But from this semester on, I have some chances to practice it in lab by working on some project. I got a AC/DC power ... </div> <div class=\"tags t-power-supply t-dc\"> <a href=\"/questions/tagged/power-supply\" class=\"post-tag\" title=\"show questions tagged 'power-supply'\" rel=\"tag\">power-supply</a> <a href=\"/questions/tagged/dc\" class=\"post-tag\" title=\"show questions tagged 'dc'\" rel=\"tag\">dc</a> </div> <div class=\"started fr\"> <div class=\"user-info \"> <div class=\"user-action-time\"> asked <span title=\"2013-08-08 02:05:53Z\" class=\"relativetime\">Aug 8 at 2:05</span> </div> <div class=\"user-gravatar32\"> <a href=\"/users/17060/user1285419\"><div class=\"\"><img src=\"https://www.gravatar.com/avatar/08ee68b20a4eceff26f7eee99b708c08?s=32&d=identicon&r=PG\" alt=\"\" width=\"32\" height=\"32\"></div></a> </div> <div class=\"user-details\"> <a href=\"/users/17060/user1285419\">user1285419</a><br> <span class=\"reputation-score\" title=\"reputation score\" dir=\"ltr\">165</span><span title=\"5 bronze badges\"><span class=\"badge3\"></span><span class=\"badgecount\">5</span></span> </div> </div> </div> </div> </div> <div class=\"question-summary\" id=\"question-summary-78328\"> <div class=\"statscontainer\"> <div class=\"statsarrow\"></div> <div class=\"stats\"> <div class=\"vote\"> <div class=\"votes\"> <span class=\"vote-count-post \"><strong>0</strong></span> <div class=\"viewcount\">votes</div> </div> </div> <div class=\"status answered\"> <strong>1</strong>answer </div> </div> <div class=\"views \" title=\"86 views\"> 86 views </div> </div> <div class=\"summary\"> <h3><a href=\"/questions/78328/reducing-capacitance-of-a-wire\" class=\"question-hyperlink\">Reducing capacitance of a wire</a></h3> <div class=\"excerpt\"> Given a wire and a piece of foil wired to a bread board, is it possible using capacitors wired in series (or some other method) to significantly reduce the capacitance of the wire/foil? </div> <div class=\"tags t-capacitor t-capacitance\"> <a href=\"/questions/tagged/capacitor\" class=\"post-tag\" title=\"show questions tagged 'capacitor'\" rel=\"tag\">capacitor</a> <a href=\"/questions/tagged/capacitance\" class=\"post-tag\" title=\"show questions tagged 'capacitance'\" rel=\"tag\">capacitance</a> </div> <div class=\"started fr\"> <div class=\"user-info \"> <div class=\"user-action-time\"> asked <span title=\"2013-08-08 02:03:19Z\" class=\"relativetime\">Aug 8 at 2:03</span> </div> <div class=\"user-gravatar32\"> <a href=\"/users/27085/j03m\"><div class=\"\"><img src=\"https://www.gravatar.com/avatar/a16354f806a5e7cdf68128173ec06ec6?s=32&d=identicon&r=PG\" alt=\"\" width=\"32\" height=\"32\"></div></a> </div> <div class=\"user-details\"> <a href=\"/users/27085/j03m\">j03m</a><br> <span class=\"reputation-score\" title=\"reputation score\" dir=\"ltr\">146</span><span title=\"4 bronze badges\"><span class=\"badge3\"></span><span class=\"badgecount\">4</span></span> </div> </div> </div> </div> </div> <div class=\"question-summary\" id=\"question-summary-78322\"> <div class=\"statscontainer\"> <div class=\"statsarrow\"></div> <div class=\"stats\"> <div class=\"vote\"> <div class=\"votes\"> <span class=\"vote-count-post \"><strong>-2</strong></span> <div class=\"viewcount\">votes</div> </div> </div> <div class=\"status answered-accepted\"> <strong>1</strong>answer </div> </div> <div class=\"views \" title=\"63 views\"> 63 views </div> </div> <div class=\"summary\"> <h3><a href=\"/questions/78322/ground-wire-installation\" class=\"question-hyperlink\">Ground Wire Installation [closed]</a></h3> <div class=\"excerpt\"> Currently I do not have ground in my house wiring. I am planing to install ground wiring but the floor around the main service panel is cemented and I don't think I can place a ground rod in the ... </div> <div class=\"tags t-wiring\"> <a href=\"/questions/tagged/wiring\" class=\"post-tag\" title=\"show questions tagged 'wiring'\" rel=\"tag\">wiring</a> </div> <div class=\"started fr\"> <div class=\"user-info \"> <div class=\"user-action-time\"> asked <span title=\"2013-08-08 00:38:13Z\" class=\"relativetime\">Aug 8 at 0:38</span> </div> <div class=\"user-gravatar32\"> <a href=\"/users/27238/khiz\"><div class=\"\"><img src=\"https://www.gravatar.com/avatar/5a94e8f9238c314cab95243f99332222?s=32&d=identicon&r=PG\" alt=\"\" width=\"32\" height=\"32\"></div></a> </div> <div class=\"user-details\"> <a href=\"/users/27238/khiz\">khiz</a><br> <span class=\"reputation-score\" title=\"reputation score\" dir=\"ltr\">33</span><span title=\"3 bronze badges\"><span class=\"badge3\"></span><span class=\"badgecount\">3</span></span> </div> </div> </div> </div> </div> <div class=\"question-summary\" id=\"question-summary-78319\"> <div class=\"statscontainer\"> <div class=\"statsarrow\"></div> <div class=\"stats\"> <div class=\"vote\"> <div class=\"votes\"> <span class=\"vote-count-post \"><strong>1</strong></span> <div class=\"viewcount\">vote</div> </div> </div> <div class=\"status answered\"> <strong>2</strong>answers </div> </div> <div class=\"views \" title=\"63 views\"> 63 views </div> </div> <div class=\"summary\"> <h3><a href=\"/questions/78319/performance-of-solar-panel-vs-dc-power-supply\" class=\"question-hyperlink\">Performance of solar panel vs. DC power supply</a></h3> <div class=\"excerpt\"> I am building a solar swamp cooler for burning man (hot dry desert environment). Purchased a 15w solar panel that outputs 0.9a at 20V in full sun (verified as true with my voltmeter). The solar panel ... </div> <div class=\"tags t-power-supply t-dc t-solar-cell\"> <a href=\"/questions/tagged/power-supply\" class=\"post-tag\" title=\"show questions tagged 'power-supply'\" rel=\"tag\">power-supply</a> <a href=\"/questions/tagged/dc\" class=\"post-tag\" title=\"show questions tagged 'dc'\" rel=\"tag\">dc</a> <a href=\"/questions/tagged/solar-cell\" class=\"post-tag\" title=\"show questions tagged 'solar-cell'\" rel=\"tag\">solar-cell</a> </div> <div class=\"started fr\"> <div class=\"user-info \"> <div class=\"user-action-time\"> asked <span title=\"2013-08-08 00:07:34Z\" class=\"relativetime\">Aug 8 at 0:07</span> </div> <div class=\"user-gravatar32\"> <a href=\"/users/27183/nimble\"><div class=\"\"><img src=\"https://www.gravatar.com/avatar/2bb088aedd0b5458b587e3bc104f1edc?s=32&d=identicon&r=PG\" alt=\"\" width=\"32\" height=\"32\"></div></a> </div> <div class=\"user-details\"> <a href=\"/users/27183/nimble\">nimble</a><br> <span class=\"reputation-score\" title=\"reputation score\" dir=\"ltr\">11</span><span title=\"1 bronze badge\"><span class=\"badge3\"></span><span class=\"badgecount\">1</span></span> </div> </div> </div> </div> </div> <div class=\"question-summary\" id=\"question-summary-78318\"> <div class=\"statscontainer\"> <div class=\"statsarrow\"></div> <div class=\"stats\"> <div class=\"vote\"> <div class=\"votes\"> <span class=\"vote-count-post \"><strong>0</strong></span> <div class=\"viewcount\">votes</div> </div> </div> <div class=\"status unanswered\"> <strong>0</strong>answers </div> </div> <div class=\"views \" title=\"23 views\"> 23 views </div> </div> <div class=\"summary\"> <h3><a href=\"/questions/78318/altium-simulation-node-voltages\" class=\"question-hyperlink\">Altium Simulation Node Voltages</a></h3> <div class=\"excerpt\"> When simulating a circuit in Altium it generates signals based on the components and net labels placed in the circuit, eg: <span class='tex2jax_ignore'>r1[i] r1[p] v1 v2 </span> Altium also adds the ... </div> <div class=\"tags t-simulation t-circuit-analysis t-altium\"> <a href=\"/questions/tagged/simulation\" class=\"post-tag\" title=\"show questions tagged 'simulation'\" rel=\"tag\">simulation</a> <a href=\"/questions/tagged/circuit-analysis\" class=\"post-tag\" title=\"show questions tagged 'circuit-analysis'\" rel=\"tag\">circuit-analysis</a> <a href=\"/questions/tagged/altium\" class=\"post-tag\" title=\"show questions tagged 'altium'\" rel=\"tag\">altium</a> </div> <div class=\"started fr\"> <div class=\"user-info \"> <div class=\"user-action-time\"> asked <span title=\"2013-08-07 23:55:41Z\" class=\"relativetime\">Aug 7 at 23:55</span> </div> <div class=\"user-gravatar32\"> <a href=\"/users/27237/troy\"><div class=\"\"><img src=\"https://www.gravatar.com/avatar/5c9a9c526c1c796a536814e3b04405d1?s=32&d=identicon&r=PG\" alt=\"\" width=\"32\" height=\"32\"></div></a> </div> <div class=\"user-details\"> <a href=\"/users/27237/troy\">Troy</a><br> <span class=\"reputation-score\" title=\"reputation score\" dir=\"ltr\">1</span><span title=\"1 bronze badge\"><span class=\"badge3\"></span><span class=\"badgecount\">1</span></span> </div> </div> </div> </div> </div> <div class=\"question-summary\" id=\"question-summary-78315\"> <div class=\"statscontainer\"> <div class=\"statsarrow\"></div> <div class=\"stats\"> <div class=\"vote\"> <div class=\"votes\"> <span class=\"vote-count-post \"><strong>1</strong></span> <div class=\"viewcount\">vote</div> </div> </div> <div class=\"status answered-accepted\"> <strong>2</strong>answers </div> </div> <div class=\"views \" title=\"146 views\"> 146 views </div> </div> <div class=\"summary\"> <h3><a href=\"/questions/78315/why-does-the-voltage-changes-in-this-simple-circuit\" class=\"question-hyperlink\">Why does the voltage changes in this simple circuit?</a></h3> <div class=\"excerpt\"> I'm beginning to learn electronics, and there's something I just can't grasp. I was told that a high resistance in a circuit would lead to a smaller current passing through it, but the voltage would ... </div> <div class=\"tags t-power t-voltage t-current t-resistance t-ohms-law\"> <a href=\"/questions/tagged/power\" class=\"post-tag\" title=\"show questions tagged 'power'\" rel=\"tag\">power</a> <a href=\"/questions/tagged/voltage\" class=\"post-tag\" title=\"show questions tagged 'voltage'\" rel=\"tag\">voltage</a> <a href=\"/questions/tagged/current\" class=\"post-tag\" title=\"show questions tagged 'current'\" rel=\"tag\">current</a> <a href=\"/questions/tagged/resistance\" class=\"post-tag\" title=\"show questions tagged 'resistance'\" rel=\"tag\">resistance</a> <a href=\"/questions/tagged/ohms-law\" class=\"post-tag\" title=\"show questions tagged 'ohms-law'\" rel=\"tag\">ohms-law</a> </div> <div class=\"started fr\"> <div class=\"user-info \"> <div class=\"user-action-time\"> asked <span title=\"2013-08-07 23:08:48Z\" class=\"relativetime\">Aug 7 at 23:08</span> </div> <div class=\"user-gravatar32\"> <a href=\"/users/27236/wingleader\"><div class=\"\"><img src=\"https://www.gravatar.com/avatar/01d2f745e0e93e81d23ca4214668eadb?s=32&d=identicon&r=PG\" alt=\"\" width=\"32\" height=\"32\"></div></a> </div> <div class=\"user-details\"> <a href=\"/users/27236/wingleader\">wingleader</a><br> <span class=\"reputation-score\" title=\"reputation score\" dir=\"ltr\">8</span><span title=\"2 bronze badges\"><span class=\"badge3\"></span><span class=\"badgecount\">2</span></span> </div> </div> </div> </div> </div> <div class=\"question-summary\" id=\"question-summary-78307\"> <div class=\"statscontainer\"> <div class=\"statsarrow\"></div> <div class=\"stats\"> <div class=\"vote\"> <div class=\"votes\"> <span class=\"vote-count-post \"><strong>-1</strong></span> <div class=\"viewcount\">votes</div> </div> </div> <div class=\"status answered-accepted\"> <strong>4</strong>answers </div> </div> <div class=\"views \" title=\"89 views\"> 89 views </div> </div> <div class=\"summary\"> <h3><a href=\"/questions/78307/how-do-i-figure-out-the-correct-polarity-of-a-dc-barrel-connector\" class=\"question-hyperlink\">How do I figure out the correct polarity of a DC barrel connector</a></h3> <div class=\"excerpt\"> I'm in the U.S. and I bought a digital wall clock from the U.K. which came with an AC adapter with input 230V/50Hz/90mA and output 9V/800mA. Now I could get a transformer to convert 120V to 230V but ... </div> <div class=\"tags t-multimeter t-polarity\"> <a href=\"/questions/tagged/multimeter\" class=\"post-tag\" title=\"show questions tagged 'multimeter'\" rel=\"tag\">multimeter</a> <a href=\"/questions/tagged/polarity\" class=\"post-tag\" title=\"show questions tagged 'polarity'\" rel=\"tag\">polarity</a> </div> <div class=\"started fr\"> <div class=\"user-info \"> <div class=\"user-action-time\"> asked <span title=\"2013-08-07 21:38:15Z\" class=\"relativetime\">Aug 7 at 21:38</span> </div> <div class=\"user-gravatar32\"> <a href=\"/users/27233/eydelber\"><div class=\"\"><img src=\"https://www.gravatar.com/avatar/f882365e2a203587fe941634b3a376b2?s=32&d=identicon&r=PG\" alt=\"\" width=\"32\" height=\"32\"></div></a> </div> <div class=\"user-details\"> <a href=\"/users/27233/eydelber\">eydelber</a><br> <span class=\"reputation-score\" title=\"reputation score\" dir=\"ltr\">101</span><span title=\"4 bronze badges\"><span 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questions tagged 'avr'\" rel=\"tag\">avr</a>&nbsp;<span class=\"item-multiplier\"><span class=\"item-multiplier-x\">&times;</span>&nbsp;<span class=\"item-multiplier-count\">493</span></span><br> <a href=\"/questions/tagged/op-amp\" class=\"post-tag\" title=\"show questions tagged 'op-amp'\" rel=\"tag\">op-amp</a>&nbsp;<span class=\"item-multiplier\"><span class=\"item-multiplier-x\">&times;</span>&nbsp;<span class=\"item-multiplier-count\">447</span></span><br> <a href=\"/questions/tagged/current\" class=\"post-tag\" title=\"show questions tagged 'current'\" rel=\"tag\">current</a>&nbsp;<span class=\"item-multiplier\"><span class=\"item-multiplier-x\">&times;</span>&nbsp;<span class=\"item-multiplier-count\">436</span></span><br> <a href=\"/questions/tagged/fpga\" class=\"post-tag\" title=\"show questions tagged 'fpga'\" rel=\"tag\">fpga</a>&nbsp;<span class=\"item-multiplier\"><span class=\"item-multiplier-x\">&times;</span>&nbsp;<span class=\"item-multiplier-count\">431</span></span><br> <a href=\"/questions/tagged/circuit\" class=\"post-tag\" title=\"show questions tagged 'circuit'\" rel=\"tag\">circuit</a>&nbsp;<span class=\"item-multiplier\"><span class=\"item-multiplier-x\">&times;</span>&nbsp;<span class=\"item-multiplier-count\">423</span></span><br> <a href=\"/questions/tagged/resistors\" class=\"post-tag\" title=\"show questions tagged 'resistors'\" rel=\"tag\">resistors</a>&nbsp;<span class=\"item-multiplier\"><span class=\"item-multiplier-x\">&times;</span>&nbsp;<span class=\"item-multiplier-count\">394</span></span><br> <a href=\"/questions/tagged/audio\" class=\"post-tag\" title=\"show questions tagged 'audio'\" rel=\"tag\">audio</a>&nbsp;<span class=\"item-multiplier\"><span class=\"item-multiplier-x\">&times;</span>&nbsp;<span class=\"item-multiplier-count\">394</span></span><br> <a href=\"/questions/tagged/motor\" class=\"post-tag\" title=\"show questions tagged 'motor'\" rel=\"tag\">motor</a>&nbsp;<span class=\"item-multiplier\"><span class=\"item-multiplier-x\">&times;</span>&nbsp;<span class=\"item-multiplier-count\">384</span></span><br> <a href=\"/questions/tagged/voltage-regulator\" class=\"post-tag\" title=\"show questions tagged 'voltage-regulator'\" rel=\"tag\">voltage-regulator</a>&nbsp;<span class=\"item-multiplier\"><span class=\"item-multiplier-x\">&times;</span>&nbsp;<span class=\"item-multiplier-count\">377</span></span><br> <a href=\"/questions/tagged/mosfet\" class=\"post-tag\" title=\"show questions tagged 'mosfet'\" rel=\"tag\">mosfet</a>&nbsp;<span class=\"item-multiplier\"><span class=\"item-multiplier-x\">&times;</span>&nbsp;<span class=\"item-multiplier-count\">374</span></span><br> <a href=\"/questions/tagged/switches\" class=\"post-tag\" title=\"show questions tagged 'switches'\" rel=\"tag\">switches</a>&nbsp;<span class=\"item-multiplier\"><span class=\"item-multiplier-x\">&times;</span>&nbsp;<span 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class=\"dno\"></div> </noscript> <script type=\"text/javascript\">var _gaq=_gaq||[];_gaq.push(['_setAccount','UA-5620270-24']); _gaq.push(['_setDomainName','.stackexchange.com']); _gaq.push(['_trackPageview']); var _qevents = _qevents || []; (function () { var ssl='https:'==document.location.protocol, s=document.getElementsByTagName('script')[0], ga=document.createElement('script'); ga.type='text/javascript'; ga.async=true; ga.src=(ssl?'https://ssl':'http://www')+'.google-analytics.com/ga.js'; s.parentNode.insertBefore(ga,s); var sc=document.createElement('script'); sc.type='text/javascript'; sc.async=true; sc.src=(ssl?'https://secure':'http://edge')+'.quantserve.com/quant.js'; s.parentNode.insertBefore(sc,s); })(); _qevents.push({ qacct: \"p-c1rF4kxgLUzNc\" }); </script> </body> </html>"; // result will be an iterator over tuples containing the start and end indices for each match in the string let result = regex.captures_iter(string); for mat in result { println!("{:?}", mat); } }

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/