随机打乱数组顺序之随机洗牌算法

var shuffleArray = function(array) {
    var currentIndex = array.length;
    var temporary;
    var toIndex;

    while (currentIndex) {
        toIndex = Math.floor(Math.random() * currentIndex--);
        temporary = array[currentIndex];
        array[currentIndex] = array[toIndex];
        array[toIndex] = temporary;
    }

    return array;
}