我使用AJAX获取了以下对象,并将它们存储在数组中:

var homes = [
    {
        "h_id": "3",
        "city": "Dallas",
        "state": "TX",
        "zip": "75201",
        "price": "162500"
    }, {
        "h_id": "4",
        "city": "Bevery Hills",
        "state": "CA",
        "zip": "90210",
        "price": "319250"
    }, {
        "h_id": "5",
        "city": "New York",
        "state": "NY",
        "zip": "00010",
        "price": "962500"
    }
];

如何创建一个函数,仅使用JavaScript按price属性按升序或降序对对象进行排序?


当前回答

这是一个更灵活的版本,允许您创建可重用的排序函数,并按任何字段排序。

const sort_by=(字段,反转,引物)=>{常量键=引物?函数(x){返回底漆(x[字段])} :函数(x){返回x[字段]};反转=!颠倒1 : -1;返回函数(a,b){返回a=键(a),b=键(b),反转*((a>b)-(b>a));}}//现在您可以随意按任何字段排序。。。const homes=[{h_id:“3”,城市:“达拉斯”,州:“TX”,邮编:“75201”,价格:“162500”},{h_id:“4”,城市“贝弗利山”,州“CA”,邮编“90210”,价格“319250”},{h_id:”5“,城市:”纽约“,州:”NY“,邮编:”00010“,价格:”962500“}];//按价格从高到低排序console.log(homes.sort(sort_by('price',true,parseInt)));//按城市排序,不区分大小写,A-Zconsole.log(homes.sort(sort_by('city',false,(a)=>a.toUpperCase())));

其他回答

我还处理了一些评级和多个字段排序:

arr = [
    {type:'C', note:834},
    {type:'D', note:732},
    {type:'D', note:008},
    {type:'F', note:474},
    {type:'P', note:283},
    {type:'P', note:165},
    {type:'X', note:173},
    {type:'Z', note:239},
];

arr.sort(function(a,b){        
    var _a = ((a.type==='C')?'0':(a.type==='P')?'1':'2');
    _a += (a.type.localeCompare(b.type)===-1)?'0':'1';
    _a += (a.note>b.note)?'1':'0';
    var _b = ((b.type==='C')?'0':(b.type==='P')?'1':'2');
    _b += (b.type.localeCompare(a.type)===-1)?'0':'1';
    _b += (b.note>a.note)?'1':'0';
    return parseInt(_a) - parseInt(_b);
});

后果

[
    {"type":"C","note":834},
    {"type":"P","note":165},
    {"type":"P","note":283},
    {"type":"D","note":8},
    {"type":"D","note":732},
    {"type":"F","note":474},
    {"type":"X","note":173},
    {"type":"Z","note":239}
]

我推荐GitHub:ArraysortBy-使用Schwartzian变换的sortBy方法的最佳实现

但现在我们将尝试这种方法Gist:sortBy-old.js。让我们创建一个方法来对数组进行排序,以便能够按某种属性排列对象。

创建排序功能

var sortBy = (function () {
  var toString = Object.prototype.toString,
      // default parser function
      parse = function (x) { return x; },
      // gets the item to be sorted
      getItem = function (x) {
        var isObject = x != null && typeof x === "object";
        var isProp = isObject && this.prop in x;
        return this.parser(isProp ? x[this.prop] : x);
      };
      
  /**
   * Sorts an array of elements.
   *
   * @param  {Array} array: the collection to sort
   * @param  {Object} cfg: the configuration options
   * @property {String}   cfg.prop: property name (if it is an Array of objects)
   * @property {Boolean}  cfg.desc: determines whether the sort is descending
   * @property {Function} cfg.parser: function to parse the items to expected type
   * @return {Array}
   */
  return function sortby (array, cfg) {
    if (!(array instanceof Array && array.length)) return [];
    if (toString.call(cfg) !== "[object Object]") cfg = {};
    if (typeof cfg.parser !== "function") cfg.parser = parse;
    cfg.desc = !!cfg.desc ? -1 : 1;
    return array.sort(function (a, b) {
      a = getItem.call(cfg, a);
      b = getItem.call(cfg, b);
      return cfg.desc * (a < b ? -1 : +(a > b));
    });
  };
  
}());

设置未排序的数据

var data = [
  {date: "2011-11-14T16:30:43Z", quantity: 2, total: 90,  tip: 0,   type: "tab"},
  {date: "2011-11-14T17:22:59Z", quantity: 2, total: 90,  tip: 0,   type: "Tab"},
  {date: "2011-11-14T16:28:54Z", quantity: 1, total: 300, tip: 200, type: "visa"},
  {date: "2011-11-14T16:53:41Z", quantity: 2, total: 90,  tip: 0,   type: "tab"},
  {date: "2011-11-14T16:48:46Z", quantity: 2, total: 90,  tip: 0,   type: "tab"},
  {date: "2011-11-14T17:25:45Z", quantity: 2, total: 200, tip: 0,   type: "cash"},
  {date: "2011-11-31T17:29:52Z", quantity: 1, total: 200, tip: 100, type: "Visa"},
  {date: "2011-11-14T16:58:03Z", quantity: 2, total: 90,  tip: 0,   type: "tab"},
  {date: "2011-11-14T16:20:19Z", quantity: 2, total: 190, tip: 100, type: "tab"},
  {date: "2011-11-01T16:17:54Z", quantity: 2, total: 190, tip: 100, type: "tab"},
  {date: "2011-11-14T17:07:21Z", quantity: 2, total: 90,  tip: 0,   type: "tab"},
  {date: "2011-11-14T16:54:06Z", quantity: 1, total: 100, tip: 0,   type: "Cash"}
];

使用它

按字符串形式的“日期”排列数组

// sort by @date (ascending)
sortBy(data, { prop: "date" });

// expected: first element
// { date: "2011-11-01T16:17:54Z", quantity: 2, total: 190, tip: 100, type: "tab" }

// expected: last element
// { date: "2011-11-31T17:29:52Z", quantity: 1, total: 200, tip: 100, type: "Visa"}

如果要忽略区分大小写,请设置解析器回调:

// sort by @type (ascending) IGNORING case-sensitive
sortBy(data, {
    prop: "type",
    parser: (t) => t.toUpperCase()
});

// expected: first element
// { date: "2011-11-14T16:54:06Z", quantity: 1, total: 100, tip: 0, type: "Cash" }

// expected: last element
// { date: "2011-11-31T17:29:52Z", quantity: 1, total: 200, tip: 100, type: "Visa" }

如果要将“日期”字段转换为日期类型:

// sort by @date (descending) AS Date object
sortBy(data, {
    prop: "date",
    desc: true,
    parser: (d) => new Date(d)
});

// expected: first element
// { date: "2011-11-31T17:29:52Z", quantity: 1, total: 200, tip: 100, type: "Visa"}

// expected: last element
// { date: "2011-11-01T16:17:54Z", quantity: 2, total: 190, tip: 100, type: "tab" }

在这里,您可以使用代码:jsbin.com/lesebi网站

由于@Ozesh的反馈,与具有虚假值的财产相关的问题得到了解决。

有了ECMAScript 6,StoBor的答案可以更加简洁:

homes.sort((a, b) => a.price - b.price)

价格降序:

homes.sort((x,y) => {return y.price - x.price})

价格升序:

homes.sort((x,y) => {return x.price - y.price})

我最近编写了一个通用函数,如果您想使用它,可以为您管理它。

/**
 * Sorts an object into an order
 *
 * @require jQuery
 *
 * @param object Our JSON object to sort
 * @param type Only alphabetical at the moment
 * @param identifier The array or object key to sort by
 * @param order Ascending or Descending
 *
 * @returns Array
 */
function sortItems(object, type, identifier, order){

    var returnedArray = [];
    var emptiesArray = []; // An array for all of our empty cans

    // Convert the given object to an array
    $.each(object, function(key, object){

        // Store all of our empty cans in their own array
        // Store all other objects in our returned array
        object[identifier] == null ? emptiesArray.push(object) : returnedArray.push(object);

    });

    // Sort the array based on the type given
    switch(type){

        case 'alphabetical':

            returnedArray.sort(function(a, b){

                return(a[identifier] == b[identifier]) ? 0 : (

                    // Sort ascending or descending based on order given
                    order == 'asc' ? a[identifier] > b[identifier] : a[identifier] < b[identifier]

                ) ? 1 : -1;

            });

            break;

        default:

    }

    // Return our sorted array along with the empties at the bottom depending on sort order
    return order == 'asc' ? returnedArray.concat(emptiesArray) : emptiesArray.concat(returnedArray);

}