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

使用lodash.sortBy(使用commonjs的说明,您也可以将cdn的脚本include标记放在html的顶部)

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

降序

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

升序

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

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}
]
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
    }
})
 function compareValues(key, order = 'asc') {
  return function innerSort(a, b) {
    if (!a.hasOwnProperty(key) || !b.hasOwnProperty(key)) {
      // property doesn't exist on either object
      return 0;
    }

    const varA = (typeof a[key] === 'string')
      ? a[key].toUpperCase() : a[key];
    const varB = (typeof b[key] === 'string')
      ? b[key].toUpperCase() : b[key];

    let comparison = 0;
    if (varA > varB) {
      comparison = 1;
    } else if (varA < varB) {
      comparison = -1;
    }
    return (
      (order === 'desc') ? (comparison * -1) : comparison
    );
  };
}

http://yazilimsozluk.com/sort-array-in-javascript-by-asc-or-desc

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);

要对其进行排序,需要创建一个接受两个参数的比较器函数。然后用比较器函数调用排序函数,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);

如果要按升序排序,请切换负号两边的表达式。