gistfile1.txt

/* 
   Dropbox.com hiring questions
   http://www.dropbox.com/webengineer
   1)
*/
function countdown(num) {
    for (var i=0; i <= num; i += 1) {
        setTimeout(function() {
                    alert(num - i);
                }, i * 1000);
    }
}

function countdown_good(num) {
    var alert_func = function(m) {
        return function() { alert(m); };
    };
    for (var i=0; i <= num; ++i) {
        setTimeout(alert_func(num - i), i * 1000);
    }
}

countdown_good(5)