vk_performer.js

function sortn(es) {

    if (es.length<1)
        return [];

    es.sort();

    var name = es[0];
    var count = 1;
    var res = [];

    for (var i=1;i<es.length;i++) {
        if (es[i] != name) {
            res.push({name:name,count:count});
            name = es[i];
            count = 1;
        } else {
            count = count + 1;
        }
    }
    res.push({name:name,count:count});

    res.sort(function(a,b){
        if (a.count<b.count) {
            return 1;
        } else if (a.count>b.count) {
            return -1;
        }
        return 0;
    });

    return res;
}

function query(qs,es,res) {
    var q = qs.shift();
    var tag = null;
    var class_ = null;
    var first = false;
    if (q.hasOwnProperty('tag')) {
        tag = q['tag'];
    }
    if (q.hasOwnProperty('class')) {
        class_ = q['class'];
    }
    if (es == null) {
        es = [document.body];
    }
    if (tag != null) {
        var es_ = [];
        es.forEach(function(m){
            [].slice.call(m.getElementsByTagName(tag)).forEach(function(n){
                if (class_ != null) {
                    if (n.classList.contains(class_)) {
                        es_.push(n);
                    }
                } else {
                    es_.push(n);
                }
            });
        });
        es = es_;
    } else {
        console.log('function query(q,f) error: tag not defined, q:');
        console.log(q);
    }
    if (qs.length == 0) {
        if (res.hasOwnProperty('all')) {
            res.all(es);
        }
        if (res.hasOwnProperty('each')) {
            es.forEach(res.each);
        }
    } else {
        query(qs,es,res);
    }
}

function objectArrayAsTable(oa,props) {
    var trs = [];
    for (var i=0;i<oa.length;i++) {
        var o = oa[i];
        var row = [];
        for (var j=0;j<props.length;j++) {
            if (o.hasOwnProperty(props[j])) {
                row.push(o[props[j]]);
            } else {
                row.push('');
            }
        }
        trs.push('<td>' + row.join('</td><td>') + '</td>');
    }
    return '<table>' + '<tr>' + trs.join('</tr><tr>') + '</tr>' + '</table>';
}

var perf = [];
query([{tag:'div','class':'title_wrap'},{tag:'b'},{tag:'a'}],null,{each:function(e){
        e.textContent.split(/[,&]/).forEach(function(n){
            var m = n.match(/\(C[.]?[Vv][:.] (.*)\)/);
            if (m) {
                perf.push(m[1].trim());
                //console.log('cv: ' + n.trim() + ' -> ' + m[1].trim());
            } else {
                perf.push(n.trim());
                //console.log('no cv: ' + n.trim());
            }
        });
    }
});
var perf_ = sortn(perf);
document.body.innerHTML = objectArrayAsTable(perf_,['name','count']);