javascript - 使用 JavaScript 将项目添加到数组中的每个对象

Question

我正在制作一种 Trivial Pursuit 游戏。我有成千上万的问题和答案；看下面的例子:

var trivialPursuitCards = [
   {
    question: "What nationality was Chopin?",
    answer: ["American", "Polish", "German", "Czech"],
    difficulty: 2
   }, 
   {
    question: "Who cut Van Gogh's ear?",
    answer: ["His sister", "His brother", "Himself", "He was born that way"],
    difficulty: 2
   }
];

现在我只需要为每张卡片添加一个属性，即:rightAnswer: undefined。

为所有卡片完成此操作的最佳方法是什么？

Answer 1

for(var i=0; i<trivialPursuitCards.length; i++) {
    trivialPursuitCards[i].rightAnswer = undefined;
}

https://jsfiddle.net/o0pa4z0w/