Finally a clean-room implementation of Google’s Page Rank Algorithm in Java, reverse-engineered from their numerous commentary on Page Rank (or is it Pigeon Rank?). Enfin une propre salle de mise en œuvre de Google Page Rank Algorithm en Java, rétro-ingénierie de leurs nombreux commentaires sur les Page Rank (ou est-il Pigeon rang?). 

 public static int getPageRank(url) {     // start off with a random low PR     int pageRank = rand.getInt(0, 3);      if ( isHostedOn('google.com', url) ) {         pageRank++;     } else if ( isHostedOn('microsoft.com', url) ) {         pageRank--;     }     // Support valid pages     if (isValidPage(url) ) {         pageRank += 1;     }      tag_value['b'] = 1;     tag_value['h2'] = 2;     tag_value['h1'] = 3;     tag_value['strong'] = -1; // W3C sux! public static int getPageRank (url) (/ / commencer avec un faible PR aléatoire int rand.getInt Pagerank = (0, 3); if (isHostedOn ( "google.com", url)) (PageRank + +;) else if (isHostedOn ( «microsoft.com», url)) (PageRank -;) / / Support valable si pages (isValidPage (url)) (PageRank + = 1;) tag_value [ 'b'] = 1; tag_value [ 'h2'] = 2; tag_value [ 'h1'] = 3; tag_value [ 'strong'] = -1 / / W3C sux! pageRank = calculateTagsPR(tag_value, pagerank);      // Sergey said good news sites have     // lots of nested tables     tablesOnPage = getTagCount(’table’);     if (tablesOnPage >= 50) {         pageRank += 2;     }      if (pageRank >= 5) {         pageRank = 4; // helps selling AdWords     }      if (linksFrom(’mattcutts.com’, url) >= 4) {         // I link to “clean” sites only         // ? Pagerank = calculateTagsPR (tag_value, pagerank) / / Sergey dit bonne nouvelle sites / / beaucoup de tableaux imbriqués tablesOnPage = getTagCount ( «table»), si (tablesOnPage> = 50) (PageRank + = 2;) if (pagerank> = 5) (Pagerank = 4 / / aide à la vente AdWords) if (linksFrom ( 'mattcutts.com ", url)> = 4) (/ / I lien" propres "sites seulement / /? Matt, Feb 2006         pagerank += 2;     }      pagerank += countBacklinks(url) / 10000;      blacklist1 = getList(’c:\chinese-government-censored.txt’);     blacklist2 = getList(’c:\larry-page-hatelist.txt’);     if ( inArray(blacklist1, url) || inArray(blacklist2, url) ) {         pageRank = 0;     }      d = dashesInUrl(url);     pageRank = (d >= 3) ? Matt, Feb 2006 pagerank + = 2;) = + pagerank countBacklinks (url) / 10000; blacklist1 = getList ( 'c: \ chinese-gouvernement-censored.txt'); blacklist2 = getList ( 'c: \ larry-page - hatelist.txt '); if (inArray (blacklist1, url) | | inArray (blacklist2, url)) (Pagerank = 0;) d = dashesInUrl (url); Pagerank = (d> = 3)? pageRank -1 : pageRank + 1;      if (inString(url, “how to build a bomb”)) {         // added on request. -1 PageRank: PageRank + 1; if (inString (url, "comment construire une bombe")) (/ / ajouté sur demande. 2004-12-01. 2004-12-01. recipient = “peter@homelandsecurity.gov”;         subject = “You might wanna check this…”;         sendMailTo(recipient, subject, url);          // page might still be relevant         pageRank++;     }      if (month() == “June” || month() == “October”) {         // makes people talk about         // PR updates, good publicity         pagerank -= randomNumber(1,3);     }          if (checkIdenticalPageAndLinkColor) {         // spammer!! destinataire = "peter@homelandsecurity.gov" subject = "Vous pouvez le vérifier…"; sendMailTo (destinataire, sujet, url) / / page peut encore être pertinente PageRank + +;) if (mois () == "Juin" | | Mois () == "Octobre") (/ / rend les gens parler de / / PR mises à jour, une bonne publicité pagerank -= randomNumber (1,3);) if (checkIdenticalPageAndLinkColor) (/ / spammeur! Googleaxe it!! Googleaxe il! pagerank = 0;     }      if (url == “http://www.nytimes.com”) {         // just testing, pls remove tomorrow         // ? pagerank = 0;) if (url == "http://www.nytimes.com") (/ / qu'un test, pls supprimer demain / /? Frank, June 2003         pagerank = 10;     }      //Don’t show PR above 10     if(pagerank > 10)  pagerank = 10;      return pagerank; } Frank, Juin 2003 pagerank = 10;) / / Ne pas afficher les PR au-dessus de 10 if (pagerank> 10) pagerank = 10; retour pagerank;)

Modified (to Java and added normalization etc.) from idea and original code by Mis à jour (à Java et a ajouté normalisation etc) et de l'idée de code original Jack Tang Jack Tang .