javascript - 如何打乱对象数组

Question

这个问题已经有答案了:

How to randomize (shuffle) a JavaScript array? (71 个回答)

已关闭 3 年前。

我正在尝试使用 shuffle npm 模块( https://www.npmjs.com/package/shuffle-array )对对象数组进行洗牌 - 但是我收到诸如“ypeError:Object(...) is not a function”之类的错误。

   let posts = [
   {
    postUrl: "https://www.linkedin.com/1",
    action: "Post",
    profileUrl: "https://www.linkedin.com/company/1",
    timestamp: "2019-10-09T09:40:05.356Z"
    },
    {
    postUrl: "https://www.linkedin.com/2",
    action: "Post",
    profileUrl: "https://www.linkedin.com/company/2",
    timestamp: "2019-10-09T09:40:05.356Z"
    },
    {
    postUrl: "https://www.linkedin.com/3",
    action: "Post",
    profileUrl: "https://www.linkedin.com/company/3",
    timestamp: "2019-10-09T09:40:05.356Z"
    },
]

posts = shuffle(posts);

你能看出我错在哪里吗？或者如何重新排列这些对象？

Answer 1

对于大多数用途，最好的方法是使用 Fisher Yates/Knuth shuffle，我确信其他一些人会链接到。本文对此进行了讨论:

How to randomize (shuffle) a JavaScript array?

随机化的核心内容归结为以下内容(也可以在上述帖子中找到!):

function shuffle(array) {
  var currentIndex = array.length, temporaryValue, randomIndex;

  // While there remain elements to shuffle...
  while (0 !== currentIndex) {

    // Pick a remaining element...
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex -= 1;

    // And swap it with the current element.
    temporaryValue = array[currentIndex];
    array[currentIndex] = array[randomIndex];
    array[randomIndex] = temporaryValue;
  }

  return array;
}

// Used like so
var arr = [2, 11, 37, 42];
arr = shuffle(arr);
console.log(arr);

希望这对您有所帮助!