javascript - 在原型(prototype) Javascript 数组中查找对象的索引

Question

我正在使用 jQuery Mobile 创建一个应用程序，需要获取原型(prototype)数组中对象的索引。

调用team的对象如下:

var team = function (teamname, colour, rss_url, twitter_url, website, coords) {
    this.teamname = teamname;
    this.colour = colour;
    this.rss_url = rss_url;
    this.twitter_url = twitter_url;
    this.website = website;
    this.location = coords;


};

数组本身看起来像:

var teamlist = [32];

teamlist[0] = new    team("Aberdeen","#C01A1A","http://www.football365.com/aberdeen/rss", "https://twitter.com/aberdeenfc","http://www.afc.co.uk/","57�09?33?N�2�05?20?W");

teamlist[1] = new team("Celtic","#C01A1A","http://www.football365.com/aberdeen/rss", "https://twitter.com/aberdeenfc","http://www.afc.co.uk/","57�09?33?N�2�05?20?W");

teamlist[2] = new team("Dundee","#C01A1A","http://www.football365.com/aberdeen/rss", "https://twitter.com/aberdeenfc","http://www.afc.co.uk/","57�09?33?N�2�05?20?W");

teamlist[3] = new team("Dundee United","#C01A1A","http://www.football365.com/aberdeen/rss", "https://twitter.com/aberdeenfc","http://www.afc.co.uk/","57�09?33?N�2�05?20?W");

teamlist[4] = new team("Hamilton Academical","#C01A1A","http://www.football365.com/aberdeen/rss", "https://twitter.com/aberdeenfc","http://www.afc.co.uk/","57�09?33?N�2�05?20?W");

teamlist[5] = new team("Inverness Caledonian Thistle","#C01A1A","http://www.football365.com/aberdeen/rss", "https://twitter.com/aberdeenfc","http://www.afc.co.uk/","57�09?33?N�2�05?20?W");`

我需要能够根据团队名称获取对象的索引。我曾想过类似的东西

var a = teamlist.indexOf(teamname: "Aberdeen");

然而，这显然是行不通的。

欢迎提出任何建议 - 提前致谢! :)

Answer 1

很简单。您可以使用 Array.prototype.some，将索引声明为词法范围内的变量，并在匹配发生时更改它。然后返回索引。像这样:

var data = [
  {x: '1'},
  {x: '2'},
  {x: '3'},
  {x: '4'}
]; // sample data

function findIndex (num) {
  // num is just the number corresponding to the object
  // in data array that we have to find
  var index = -1; // default value, in case no element is found
  data.some(function (el, i){
    if (el.x === num) {
      index = i;
      return true;
    }
  }); // some will stop iterating the moment we return true
  return index;
}

console.log(findIndex('3'));

希望对您有所帮助!