如何随机化多维数组中的测验问题顺序？

Question

var questions =[
new Question ("Who is the president of Czech Republic?", ["Donald Trump", "Andrej Kiska", "Milos Zeman", "Angela Merkel"], "Milos Zeman"),
new Question ("The capital of Czech Republic is:", ["Brno", "Ostrava", "Hradec Kralove", "Prague"], "Prague"),
new Question ("Which food is not common Czech food?", ["Cevapcici", "Svickova", "Trdelnik", "Tatarak"], "Cevapcici")];
var quiz = new Quiz(questions);
populate();

如何随机排列本测验中的问题顺序？这是工作示例：

https://jsfiddle.net/yhosftnt/

Answer 1

使用随机数对它们进行排序 (demo)：

this.questions = [].concat(questions).sort(function() {
    return Math.random() - Math.random();
});

[].concat(questions) 创建了一个新数组，所以原来的数组不会改变。