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);

其他回答

嗨,看完这篇文章后,我根据自己的需要制作了一个sortComprator,它具有比较多个json属性的功能,我想和大家分享一下。

此解决方案仅按升序比较字符串,但该解决方案可以方便地扩展到每个属性以支持:反向排序、其他数据类型、使用区域设置、强制转换等

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"

}];

// comp = array of attributes to sort
// comp = ['attr1', 'attr2', 'attr3', ...]
function sortComparator(a, b, comp) {
    // Compare the values of the first attribute
    if (a[comp[0]] === b[comp[0]]) {
        // if EQ proceed with the next attributes
        if (comp.length > 1) {
            return sortComparator(a, b, comp.slice(1));
        } else {
            // if no more attributes then return EQ
            return 0;
        }
    } else {
        // return less or great
        return (a[comp[0]] < b[comp[0]] ? -1 : 1)
    }
}

// Sort array homes
homes.sort(function(a, b) {
    return sortComparator(a, b, ['state', 'city', 'zip']);
});

// display the array
homes.forEach(function(home) {
    console.log(home.h_id, home.city, home.state, home.zip, home.price);
});

结果是

$ node sort
4 Bevery Hills CA 90210 319250
5 New York NY 00010 962500
3 Dallas TX 75201 162500

还有另一种

homes.sort(function(a, b) {
    return sortComparator(a, b, ['city', 'zip']);
});

带有结果

$ node sort
4 Bevery Hills CA 90210 319250
3 Dallas TX 75201 162500
5 New York NY 00010 962500

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' );

按价格升序排序:

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

或ES6版本之后:

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

这里可以找到一些文档。

对于降序,可以使用

homes.sort((a, b) => parseFloat(b.price) - parseFloat(a.price));
Array.prototype.sortBy = function(callback) {
  return this.sort((a, b) => callback(a) - callback(b))
}

[1,2,3,2].sortBy(i => i) // [1, 2, 2, 3]
[1,2,3,2].sortBy(i => i == 2) // [1, 3, 2, 2]
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)
})