从这个最初的问题,我将如何在多个字段应用排序?

使用这种稍作调整的结构,我将如何排序城市(上升)和价格(下降)?

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":"6",
     "city":"Dallas",
     "state":"TX",
     "zip":"75000",
     "price":"556699"},
    {"h_id":"5",
     "city":"New York",
     "state":"NY",
     "zip":"00010",
     "price":"962500"}
    ];

我喜欢的事实是,给出的答案提供了一个一般的方法。在我计划使用这段代码的地方,我将不得不对日期以及其他东西进行排序。“启动”对象的能力似乎很方便,如果不是有点麻烦的话。

我试图把这个答案构建成一个很好的通用示例,但我运气不太好。


当前回答

以下是我的简历,请参考,并举例说明:

function msort(arr, ...compFns) {
  let fn = compFns[0];
  arr = [].concat(arr);
  let arr1 = [];
  while (arr.length > 0) {
    let arr2 = arr.splice(0, 1);
    for (let i = arr.length; i > 0;) {
      if (fn(arr2[0], arr[--i]) === 0) {
        arr2 = arr2.concat(arr.splice(i, 1));
      }
    }
    arr1.push(arr2);
  }

  arr1.sort(function (a, b) {
    return fn(a[0], b[0]);
  });

  compFns = compFns.slice(1);
  let res = [];
  arr1.map(a1 => {
    if (compFns.length > 0) a1 = msort(a1, ...compFns);
    a1.map(a2 => res.push(a2));
  });
  return res;
}

let tstArr = [{ id: 1, sex: 'o' }, { id: 2, sex: 'm' }, { id: 3, sex: 'm' }, { id: 4, sex: 'f' }, { id: 5, sex: 'm' }, { id: 6, sex: 'o' }, { id: 7, sex: 'f' }];

function tstFn1(a, b) {
  if (a.sex > b.sex) return 1;
  else if (a.sex < b.sex) return -1;
  return 0;
}

function tstFn2(a, b) {
  if (a.id > b.id) return -1;
  else if (a.id < b.id) return 1;
  return 0;
}

console.log(JSON.stringify(msort(tstArr, tstFn1, tstFn2)));
//output:
//[{"id":7,"sex":"f"},{"id":4,"sex":"f"},{"id":5,"sex":"m"},{"id":3,"sex":"m"},{"id":2,"sex":"m"},{"id":6,"sex":"o"},{"id":1,"sex":"o"}]

其他回答

下面的函数将允许您对一个或多个属性上的对象数组进行排序,对每个属性进行升序(默认值)或降序排序,并允许您选择是否执行区分大小写的比较。默认情况下,该函数执行不区分大小写的排序。

第一个参数必须是包含对象的数组。 后面的参数必须是一个以逗号分隔的字符串列表,这些字符串引用要排序的不同对象属性。最后一个参数(可选)是一个布尔值,用于选择是否执行区分大小写的排序——区分大小写的排序使用true。

默认情况下,该函数将按升序对每个属性/键排序。如果你想要一个特定的键按降序排序,那么取而代之的是传递一个这样格式的数组:['property_name', true]。

下面是该函数的一些示例用法,后面附有解释(其中homes是一个包含对象的数组):

objSort(homes, 'city')—>按城市排序(升序,不区分大小写)

objSort(homes, ['city', true])——>按城市排序(降序,不区分大小写)

objSort(homes, 'city', true)—>按城市然后价格排序(升序,区分大小写)

objSort(homes, 'city', 'price')——>先按城市再按价格排序(均为升序,不区分大小写)

objSort(homes, 'city', ['price', true])——>排序城市(升序)然后价格(降序),不区分大小写)

话不多说,下面是函数:

function objSort() {
    var args = arguments,
        array = args[0],
        case_sensitive, keys_length, key, desc, a, b, i;

    if (typeof arguments[arguments.length - 1] === 'boolean') {
        case_sensitive = arguments[arguments.length - 1];
        keys_length = arguments.length - 1;
    } else {
        case_sensitive = false;
        keys_length = arguments.length;
    }

    return array.sort(function (obj1, obj2) {
        for (i = 1; i < keys_length; i++) {
            key = args[i];
            if (typeof key !== 'string') {
                desc = key[1];
                key = key[0];
                a = obj1[args[i][0]];
                b = obj2[args[i][0]];
            } else {
                desc = false;
                a = obj1[args[i]];
                b = obj2[args[i]];
            }

            if (case_sensitive === false && typeof a === 'string') {
                a = a.toLowerCase();
                b = b.toLowerCase();
            }

            if (! desc) {
                if (a < b) return -1;
                if (a > b) return 1;
            } else {
                if (a > b) return -1;
                if (a < b) return 1;
            }
        }
        return 0;
    });
} //end of objSort() function

下面是一些样本数据:

var homes = [{
    "h_id": "3",
    "city": "Dallas",
    "state": "TX",
    "zip": "75201",
    "price": 162500
}, {
    "h_id": "4",
    "city": "Bevery Hills",
    "state": "CA",
    "zip": "90210",
    "price": 1000000
}, {
    "h_id": "5",
    "city": "new york",
    "state": "NY",
    "zip": "00010",
    "price": 1000000
}, {
    "h_id": "6",
    "city": "Dallas",
    "state": "TX",
    "zip": "85000",
    "price": 300000
}, {
    "h_id": "7",
    "city": "New York",
    "state": "NY",
    "zip": "00020",
    "price": 345000
}];
// custom sorting by city
const sortArray = ['Dallas', 'New York', 'Beverly Hills'];

const sortData = (sortBy) =>
  data
    .sort((a, b) => {
      const aIndex = sortBy.indexOf(a.city);
      const bIndex = sortBy.indexOf(b.city);

      if (aIndex < bIndex) {
        return -1;
      }

      if (aIndex === bIndex) {
        // price descending
        return b.price- a.price;
      }

      return 1;
    });

sortData(sortArray);

按多个字段排序对象数组的最简单方法:

 let 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":"6",
   "city":"Dallas",
   "state":"TX",
   "zip":"75000",
   "price":"556699"},
  {"h_id":"5",
   "city":"New York",
   "state":"NY",
   "zip":"00010",
   "price":"962500"}
  ];

homes.sort((a, b) => (a.city > b.city) ? 1 : -1);

输出: “Bevery山” “达拉斯” “达拉斯” “达拉斯” “纽约”

对于你的具体问题,一个非通用的,简单的解决方案:

homes.sort(
   function(a, b) {          
      if (a.city === b.city) {
         // Price is only important when cities are the same
         return b.price - a.price;
      }
      return a.city > b.city ? 1 : -1;
   });

为了简化操作,可以使用这些辅助函数。

您可以根据需要对任意多个字段进行排序。对于每个排序字段,指定属性名,然后可选地指定-1作为排序方向,以降序排序而不是升序排序。

const data = [ {"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":"6","city":"Dallas","state":"TX","zip":"75000","price":"556699"}, {"h_id":"5","city":"New York","state":"NY","zip":"00010","price":"962500"}, {"h_id":"7","city":"New York","state":"NY","zip":"00010","price":"800500"} ] const sortLexically = (p,d=1)=>(a,b)=>d * a[p].localeCompare(b[p]) const sortNumerically = (p,d=1)=>(a,b)=>d * (a[p]-b[p]) const sortBy = sorts=>(a,b)=>sorts.reduce((r,s)=>r||s(a,b),0) // sort first by city, then by price descending data.sort(sortBy([sortLexically('city'), sortNumerically('price', -1)])) console.log(data)