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

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}
]

其他回答

一个简单的代码:

var家=[{“h_id”:“3”,“城市”:“达拉斯”,“状态”:“TX”,“zip”:“75201”,“价格”:“162500”}, {“h_id”:“4”,“城市”:“贝弗利山”,“状态”:“CA”,“zip”:“90210”,“price”:“319250”}, {“h_id”:“5”,“城市”:“纽约”,“州”:“NY”,“zip”:“00010”,“价格”:“962500”}];let sortByPrice=homes.sort(函数(a,b){return parseFloat(b.price)-parseFlat(a.price);});对于(var i=0;i<sortByPrice.length;i++){document.write(sortByPrice[i].h-id+“”+sortByPrice[i].city+“”+按价格排序[i].state+''+sortByPrice[i].zip+“”+sortByPrice[i].price);document.write(“<br>”);}

你需要两个功能

function desc(a, b) {
 return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
}

function asc(a, b) {
  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
}

然后可以将其应用于任何对象属性:

 data.sort((a, b) => desc(parseFloat(a.price), parseFloat(b.price)));

让数据=[{label:“一”,值:10},{label:“two”,值:5},{label:“three”,值:1},];//排序函数函数desc(a,b){返回b<a-1:b>a?1:b>=a?0:NaN;}函数asc(a,b){返回a<b-1:a>b?1:a>=b?0:NaN;}//描述(DESC)data.sort((a,b)=>desc(a.value,b.value));document.body.insert相邻HTML('之前','<strong>DESC排序</strong><pre>'+JSON.stringify(数据)+'</pre>');//美国科学院data.sort((a,b)=>asc(a.value,b.value));document.body.insert相邻HTML('之前','<strong>ASCending sorted</strong><pre>'+JSON.stringify(数据)+'</pre>');

要对数组进行排序,必须定义一个比较器函数。此函数始终根据您所需的排序模式或顺序(即升序或降序)而不同。

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']);
}

排序数字(按字母顺序和升序):

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

排序数字(按字母顺序和降序):

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

排序编号(数字和升序):

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

排序编号(数字和降序):

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

如上所述,将sorterPriceAsc和sorterPriceDes方法用于具有所需键的数组。

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

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;
    });
}

优势:

财产的自动补全扩展阵列原型不更改数组易于在方法链中使用

用法:

Array.prototype.orderBy=函数(选择器,desc=false){return[…this].sort((a,b)=>{a=选择器(a);b=选择器(b);如果(a==b)返回0;返回(desc?a>b:a<b)-1 : 1;});};var家=[{“h_id”:“3”,“城市”:“达拉斯”,“状态”:“TX”,“zip”:“75201”,“价格”:“162500”}, {“h_id”:“4”,“城市”:“贝弗利山”,“状态”:“CA”,“zip”:“90210”,“price”:“319250”}, {“h_id”:“5”,“城市”:“纽约”,“州”:“NY”,“zip”:“00010”,“价格”:“962500”}];let sorted_homes=homes.orderBy(h=>parseFloat(h.price));console.log(“按价格排序”,sorted_homes);let sorted_homes_desc=homes.orderBy(h=>h.city,true);console.log(“按城市降序排序”,sorted_home_desc);

用于字符串排序,以防有人需要,

常量数据Arr={“您好”:[{“id”:114,“关键字”:“zzzzzz”,“地区”:“斯里兰卡”,“supportGroup”:“administrators”,“category”:“类别2”}, {“id”:115,“关键字”:“aaaaa”,“地区”:“日本”,“supportGroup”:“开发者”,“category”:“类别2”}]};const sortArray=dataArr['hello'];console.log(sortArray.sort((a,b)=>{如果(a.region<b.region)返回-1;如果(a.region>b.region)返回1;返回0;}));