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

function sortByProperty(home){
    return home.price
}

sortByProperty按价格获取属性。将来,您可能希望按“zip”或字符串值“city”对数据进行排序。您需要在上面的函数中更改home.price

// if you want descending order change this to false
// if you are on react.js you could set this with useState
const ascending=true
// Initially "b" is the index-1 item and "a" is the index-0 item
homes.sort((a,b)=>{
     //initially 0th index
     const first=sortByProperty(a)
     // initially 1st index 
     const second=sortByProperty(b)
     
     // if you multiply by -1 it will be descending 
     const sortOrder=ascending ? 1 : -1
     if (typeof first==="number"){
            return (first-second) * sortOrder
    } else {
           // this will compare the string values
           return (first.localeCompare(second)) * sortOrder
    }
})

其他回答

您可以将JavaScript排序方法与回调函数一起使用:

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);

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())));

使用以下代码创建函数并根据输入进行排序

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"

 }];

 function sortList(list,order){
     if(order=="ASC"){
        return list.sort((a,b)=>{
            return parseFloat(a.price) - parseFloat(b.price);
        })
     }
     else{
        return list.sort((a,b)=>{
            return parseFloat(b.price) - parseFloat(a.price);
        });
     }
 }

 sortList(homes,'DESC');
 console.log(homes);

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>”);}

homes.sort(function(a, b){
  var nameA=a.prices.toLowerCase(), nameB=b.prices.toLowerCase()
  if (nameA < nameB) //sort string ascending
    return -1 
  if (nameA > nameB)
    return 1
  return 0 //default return value (no sorting)
})