Mitarbeiter von Google ließen mir die Kernfunktion für den Google-PageRank-Algorithmus zukommen. Bitte beachtet dies bei Euren weiteren Arbeiten!!
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function getPagerank(url)
{
// start off with a random low PR
pagerank = randomNumber(0, 3);
if ( pageHostedOn(url, 'google.com') ) {
pagerank++;
}
else if ( pageHostedOn(url, 'microsoft.com') ) {
pagerank--;
}
if ( pageValidates(url) ) {
pagerank *= .5;
}
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
// – Matt, Feb 2006
pagerank += 2;
}
pagerank += countBacklinks(url) / 10000;
blacklist1 = getList('government.cn/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. 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 ( linkCol(url) == WHITE &&
pageCol(url) == WHITE ) {
// spammer!! Googleaxe it!!
pagerank = 0;
}
if (url == "https://www.nytimes.com") {
// just testing, pls remove tomorrow
// – Frank, June 2003
pagerank = 10;
}
return pagerank;
}
----<snap<---------------------------------------------------
... an einigen Zeilen könnte was drann sein
grüße
Daniel
