对JavaScript对象数组进行排序

Question

我使用Ajax读取以下对象并将它们存储在一个数组中:

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"
    }
];

如何使用JavaScript 创建一个函数来按price属性按升序 或 降序对对象进行排序？

Answer 1

按价格按升序排序房屋:

homes.sort(function(a, b) {
    return parseFloat(a.price) - parseFloat(b.price);
});

或者在ES6版本之后:

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

有些文档可以在这里找到.

Answer 2

这是一个更灵活的版本,它允许您创建可重复使用的排序函数,并按任何字段排序.

const sort_by = (field, reverse, primer) => {

  const key = primer ?
    function(x) {
      return primer(x[field])
    } :
    function(x) {
      return x[field]
    };

  reverse = !reverse ? 1 : -1;

  return function(a, b) {
    return a = key(a), b = key(b), reverse * ((a > b) - (b > a));
  }
}


//Now you can sort by any field at will...

const 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"}];

// Sort by price high to low
console.log(homes.sort(sort_by('price', true, parseInt)));

// Sort by city, case-insensitive, A-Z
console.log(homes.sort(sort_by('city', false, (a) =>  a.toUpperCase()
)));

现在您可以随意按任意字段排序......

const sort_by = (field, reverse, primer) => {

  const key = primer ?
    function(x) {
      return primer(x[field])
    } :
    function(x) {
      return x[field]
    };

  reverse = !reverse ? 1 : -1;

  return function(a, b) {
    return a = key(a), b = key(b), reverse * ((a > b) - (b > a));
  }
}


//Now you can sort by any field at will...

const 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"}];

// Sort by price high to low
console.log(homes.sort(sort_by('price', true, parseInt)));

// Sort by city, case-insensitive, A-Z
console.log(homes.sort(sort_by('city', false, (a) =>  a.toUpperCase()
)));

Answer 3

要对它进行排序,您需要创建一个带有两个参数的比较器函数.然后使用该比较器函数调用sort函数,如下所示:

// a and b are object elements of your array
function mycomparator(a,b) {
  return parseInt(a.price, 10) - parseInt(b.price, 10);
}
homes.sort(mycomparator);

如果要对升序进行排序,请在减号的每一侧切换表达式.

Answer 4

对于字符串排序,如果有人需要它,

const dataArr = {

  "hello": [{
    "id": 114,
    "keyword": "zzzzzz",
    "region": "Sri Lanka",
    "supportGroup": "administrators",
    "category": "Category2"
  }, {
    "id": 115,
    "keyword": "aaaaa",
    "region": "Japan",
    "supportGroup": "developers",
    "category": "Category2"
  }]

};
const sortArray = dataArr['hello'];

console.log(sortArray.sort((a, b) => {
  if (a.region < b.region)
    return -1;
  if (a.region > b.region)
    return 1;
  return 0;
}));

Answer 5

如果您有符合ES6标准的浏览器,则可以使用:

• 箭头功能
• Number()函数
• sort()函数

升序和降序排序顺序之间的差异是比较函数返回的值的符号:

var ascending = homes.sort((a, b) => Number(a.price) - Number(b.price));
var descending = homes.sort((a, b) => Number(b.price) - Number(a.price));

这是一个有效的代码片段:

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"
}];

homes.sort((a, b) => Number(a.price) - Number(b.price));
console.log("ascending", homes);

homes.sort((a, b) => Number(b.price) - Number(a.price));
console.log("descending", homes);

Answer 6

你想用Javascript对它进行排序,对吧？你想要的是sort()功能.在这种情况下,您需要编写一个比较器函数并将其传递给sort(),如下所示:

function comparator(a, b) {
    return parseInt(a["price"], 10) - parseInt(b["price"], 10);
}

var json = { "homes": [ /* your previous data */ ] };
console.log(json["homes"].sort(comparator));

比较器从阵列中的每个嵌套哈希中取出一个,并通过检查"price"字段来决定哪一个更高.

Answer 7

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

但是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排序能够通过某些属性排列对象的数组.

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

安排所述阵列,通过"date"如String

// 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parser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"date"字段转换为Date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" }

在这里你可以玩代码: jsbin.com/lesebi

感谢@Ozesh的反馈意见,修复了与具有假值的属性相关的问题.

Answer 8

使用lodash.sortBy,(使用commonjs的说明,你也可以在你的html顶部放置cdn的脚本include-tag)

var sortBy = require('lodash.sortby');
// or
sortBy = require('lodash').sortBy;

降序排列

var descendingOrder = sortBy( homes, 'price' ).reverse();

升序

var ascendingOrder = sortBy( homes, 'price' );

Answer 9

虽然我知道 OP 想要对数字数组进行排序，但此问题已被标记为有关字符串的类似问题的答案。为此，上述答案没有考虑对大小写很重要的文本数组进行排序。大多数答案采用字符串值并将它们转换为大写/小写，然后以一种或另一种方式排序。我遵守的要求很简单：

• 按字母顺序排序 AZ
• 同一个单词的大写值应该在小写值之前
• 相同的字母 (A/a, B/b) 值应组合在一起

我期望的是，[ A, a, B, b, C, c ]但上面的答案返回A, B, C, a, b, c。实际上，我在这个问题上挠头的时间比我想要的要长（这就是我发布此内容的原因，希望它至少能帮助另一个人）。虽然有两个用户localeCompare在标记答案的评论中提到了该功能，但直到我在四处搜索时偶然发现该功能后，我才看到这一点。在阅读了 String.prototype.localeCompare() 文档后，我想出了这个：

var values = [ "Delta", "charlie", "delta", "Charlie", "Bravo", "alpha", "Alpha", "bravo" ];
var sorted = values.sort((a, b) => a.localeCompare(b, undefined, { caseFirst: "upper" }));
// Result: [ "Alpha", "alpha", "Bravo", "bravo", "Charlie", "charlie", "Delta", "delta" ]

这告诉函数在小写值之前对大写值进行排序。localeCompare函数中的第二个参数是定义语言环境，但如果您保留它，undefined它会自动为您计算语言环境。

这也适用于对对象数组进行排序：

var values = [
    { id: 6, title: "Delta" },
    { id: 2, title: "charlie" },
    { id: 3, title: "delta" },
    { id: 1, title: "Charlie" },
    { id: 8, title: "Bravo" },
    { id: 5, title: "alpha" },
    { id: 4, title: "Alpha" },
    { id: 7, title: "bravo" }
];
var sorted = values
    .sort((a, b) => a.title.localeCompare(b.title, undefined, { caseFirst: "upper" }));

Answer 10

这可以通过简单的一行valueof()排序函数来实现.在下面运行代码片段以查看演示.

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"
    }
];

console.log("To sort descending/highest first, use operator '<'");

homes.sort(function(a,b) { return a.price.valueOf() < b.price.valueOf();});

console.log(homes);

console.log("To sort ascending/lowest first, use operator '>'");

homes.sort(function(a,b) { return a.price.valueOf() > b.price.valueOf();});

console.log(homes);

Answer 11

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})

Answer 12

这是上述所有答案的高潮。

小提琴验证：http : //jsfiddle.net/bobberino/4qqk3/

var sortOn = function (arr, prop, reverse, numeric) {

    // Ensure there's a property
    if (!prop || !arr) {
        return arr
    }

    // Set up sort function
    var sort_by = function (field, rev, primer) {

        // Return the required a,b function
        return function (a, b) {

            // Reset a, b to the field
            a = primer(a[field]), b = primer(b[field]);

            // Do actual sorting, reverse as needed
            return ((a < b) ? -1 : ((a > b) ? 1 : 0)) * (rev ? -1 : 1);
        }

    }

    // Distinguish between numeric and string to prevent 100's from coming before smaller
    // e.g.
    // 1
    // 20
    // 3
    // 4000
    // 50

    if (numeric) {

        // Do sort "in place" with sort_by function
        arr.sort(sort_by(prop, reverse, function (a) {

            // - Force value to a string.
            // - Replace any non numeric characters.
            // - Parse as float to allow 0.02 values.
            return parseFloat(String(a).replace(/[^0-9.-]+/g, ''));

        }));
    } else {

        // Do sort "in place" with sort_by function
        arr.sort(sort_by(prop, reverse, function (a) {

            // - Force value to string.
            return String(a).toUpperCase();

        }));
    }


}

Answer 13

我参加聚会的时间不晚，但下面是我排序的逻辑。

function getSortedData(data, prop, isAsc) {
    return data.sort((a, b) => {
        return (a[prop] < b[prop] ? -1 : 1) * (isAsc ? 1 : -1)
    });
}

Answer 14

您可以使用 string1.localeCompare(string2) 进行字符串比较

this.myArray.sort((a,b) => { 
    return a.stringProp.localeCompare(b.stringProp);
});

请注意，localCompare是区分在敏感

Answer 15

一个更像 LINQ 的解决方案：

Array.prototype.orderBy = function (selector, desc = false) {
    return [...this].sort((a, b) => {
        a = selector(a);
        b = selector(b);

        if (a == b) return 0;
        return (desc ? a > b : a < b) ? -1 : 1;
    });
}

优点：

• 属性自动补全
• 扩展数组原型
• 不改变数组
• 易于在方法链中使用

用法：

Array.prototype.orderBy = function(selector, desc = false) {
  return [...this].sort((a, b) => {
    a = selector(a);
    b = selector(b);

    if (a == b) return 0;
    return (desc ? a > b : a < b) ? -1 : 1;
  });
};

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"
}];

let sorted_homes = homes.orderBy(h => parseFloat(h.price));
console.log("sorted by price", sorted_homes);

let sorted_homes_desc = homes.orderBy(h => h.city, true);
console.log("sorted by City descending", sorted_homes_desc);

Answer 16

您可以使用sort带有回调函数的 JavaScript方法：

function compareASC(homeA, homeB)
{
    return parseFloat(homeA.price) - parseFloat(homeB.price);
}

function compareDESC(homeA, homeB)
{
    return parseFloat(homeB.price) - parseFloat(homeA.price);
}

// Sort ASC
homes.sort(compareASC);

// Sort DESC
homes.sort(compareDESC);

Answer 17

要对数组进行排序，您必须定义一个比较器函数。此功能在您想要的排序模式或顺序（即升序或降序）上总是不同的。

让我们创建一些函数，对数组进行升序或降序排序，并包含对象、字符串或数值。

function sorterAscending(a,b) {
    return a-b;
}

function sorterDescending(a,b) {
    return b-a;
}

function sorterPriceAsc(a,b) {
    return parseInt(a['price']) - parseInt(b['price']);
}

function sorterPriceDes(a,b) {
    return parseInt(b['price']) - parseInt(b['price']);
}

对数字进行排序（按字母顺序和升序）：

var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.sort();

对数字进行排序（按字母顺序和降序）：

var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.sort();
fruits.reverse();

排序数字（数字和升序）：

var points = [40,100,1,5,25,10];
points.sort(sorterAscending());

排序数字（数字和降序）：

var points = [40,100,1,5,25,10];
points.sort(sorterDescending());

如上所述，将 sorterPriceAsc 和 sorterPriceDes 方法与具有所需键的数组一起使用。

homes.sort(sorterPriceAsc()) or homes.sort(sorterPriceDes())

Answer 18

我还使用了某种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);
});

结果

[
    {"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}
]

Answer 19

虽然仅对单个数组进行排序有点矫枉过正，但此原型函数允许使用语法按任何键（包括嵌套键）按任何键（包括嵌套键）对 Javascript 数组进行排序dot。

(function(){
    var keyPaths = [];

    var saveKeyPath = function(path) {
        keyPaths.push({
            sign: (path[0] === '+' || path[0] === '-')? parseInt(path.shift()+1) : 1,
            path: path
        });
    };

    var valueOf = function(object, path) {
        var ptr = object;
        for (var i=0,l=path.length; i<l; i++) ptr = ptr[path[i]];
        return ptr;
    };

    var comparer = function(a, b) {
        for (var i = 0, l = keyPaths.length; i < l; i++) {
            aVal = valueOf(a, keyPaths[i].path);
            bVal = valueOf(b, keyPaths[i].path);
            if (aVal > bVal) return keyPaths[i].sign;
            if (aVal < bVal) return -keyPaths[i].sign;
        }
        return 0;
    };

    Array.prototype.sortBy = function() {
        keyPaths = [];
        for (var i=0,l=arguments.length; i<l; i++) {
            switch (typeof(arguments[i])) {
                case "object": saveKeyPath(arguments[i]); break;
                case "string": saveKeyPath(arguments[i].match(/[+-]|[^.]+/g)); break;
            }
        }
        return this.sort(comparer);
    };    
})();

用法：

var data = [
    { name: { first: 'Josh', last: 'Jones' }, age: 30 },
    { name: { first: 'Carlos', last: 'Jacques' }, age: 19 },
    { name: { first: 'Carlos', last: 'Dante' }, age: 23 },
    { name: { first: 'Tim', last: 'Marley' }, age: 9 },
    { name: { first: 'Courtney', last: 'Smith' }, age: 27 },
    { name: { first: 'Bob', last: 'Smith' }, age: 30 }
]

data.sortBy('age'); // "Tim Marley(9)", "Carlos Jacques(19)", "Carlos Dante(23)", "Courtney Smith(27)", "Josh Jones(30)", "Bob Smith(30)"

使用点语法或数组语法按嵌套属性排序：

data.sortBy('name.first'); // "Bob Smith(30)", "Carlos Dante(23)", "Carlos Jacques(19)", "Courtney Smith(27)", "Josh Jones(30)", "Tim Marley(9)"
data.sortBy(['name', 'first']); // "Bob Smith(30)", "Carlos Dante(23)", "Carlos Jacques(19)", "Courtney Smith(27)", "Josh Jones(30)", "Tim Marley(9)"

按多个键排序：

data.sortBy('name.first', 'age'); // "Bob Smith(30)", "Carlos Jacques(19)", "Carlos Dante(23)", "Courtney Smith(27)", "Josh Jones(30)", "Tim Marley(9)"
data.sortBy('name.first', '-age'); // "Bob Smith(30)", "Carlos Dante(23)", "Carlos Jacques(19)", "Courtney Smith(27)", "Josh Jones(30)", "Tim Marley(9)"

你可以分叉 repo：https : //github.com/eneko/Array.sortBy

Answer 20

使用 ECMAScript 6 StoBor 的答案可以做得更简洁：

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