Função utilizada para sortear entre os participantes na lista da eventick (em checkin.eventick.com.br)

raffle-attendees.js

function selectOne(){
    var x=  [].slice.call(document.querySelectorAll('.tml-attendees-checked td:nth-child(2) strong')).map(function (cur){return cur.innerText;});
    var picked = x[ Math.ceil(Math.random() * x.length) ];
    console.log("%c" + picked, "font-weight: bold; color: red; font-size: 40px;");
    return picked;
}

function selectAsMany(howMany){
    var picked = [],
        lastSelected,
        cur = 0,
        limit = 100;

    while(picked.length < howMany){
        cur++;
        lastSelected = selectOne();
        if(picked.indexOf(lastSelected) < 0){
            picked.push(lastSelected);
        }
        if(cur >= limit){
            return;
        }
    }
}