Сергей Мельников

var count = $("input[name='files[]']").filter(function(el){ return $(this).val() }).length;

var animals = ["конь", "гусь", "краб", "кот", "пёс", "клоп"];
shuffle(animals);

.menu-main li ul li {
  overflow: hidden;
  width: 200px;
  padding: 0 10px;
}

.menu-main li ul li {
  width: 200px;
  padding: 0 10px;
}

function isTouch() {
	try {
		document.createEvent("TouchEvent");
		return true;
	}
	catch (e) { return false; }
}

function cloneArray(array){
    var result = [];
    for (var i in array) {
        if (array[i] === undefined) continue;
        result[i] = array[i].length ? cloneArray(array[i]) : array[i];
    }
    return result;
}

var data = [[10,10], [0,30], [20,30], [10,10]];

var array1 = cloneArray(data);
var array2 = cloneArray(data);