Sorting An Array By Multiple Criteria

gistfile1.txt

ig.game.backgroundMaps.sort(function(a,b) {
    var o1 = (a.repeat ? 0 : 1);
    var o2 = (b.repeat ? 0 : 1);
    var p1 = (a.foreground ? 1 : 0);
    var p2 = (b.foreground ? 1 : 0);
    if(o1 === o2) {
        return (p1 < p2) ? -1 : (p1 > p2) ? 1 : 0;
    } else {
        return (o1 < o2) ? -1 : 1;
    }
});