如果我有一个JavaScript对象,如:
var list = {
"you": 100,
"me": 75,
"foo": 116,
"bar": 15
};
是否有一种方法可以根据值对属性进行排序?最后得到
list = {
"bar": 15,
"me": 75,
"you": 100,
"foo": 116
};
如果我有一个JavaScript对象,如:
var list = {
"you": 100,
"me": 75,
"foo": 116,
"bar": 15
};
是否有一种方法可以根据值对属性进行排序?最后得到
list = {
"bar": 15,
"me": 75,
"you": 100,
"foo": 116
};
当前回答
谢谢你,继续回答@Nosredna
现在我们知道对象需要转换为数组,然后对数组排序。这对于按字符串排序数组(或转换对象为数组)非常有用:
Object {6: Object, 7: Object, 8: Object, 9: Object, 10: Object, 11: Object, 12: Object}
6: Object
id: "6"
name: "PhD"
obe_service_type_id: "2"
__proto__: Object
7: Object
id: "7"
name: "BVC (BPTC)"
obe_service_type_id: "2"
__proto__: Object
//Sort options
var sortable = [];
for (var vehicle in options)
sortable.push([vehicle, options[vehicle]]);
sortable.sort(function(a, b) {
return a[1].name < b[1].name ? -1 : 1;
});
//sortable => prints
[Array[2], Array[2], Array[2], Array[2], Array[2], Array[2], Array[2]]
0: Array[2]
0: "11"
1: Object
id: "11"
name: "AS/A2"
obe_service_type_id: "2"
__proto__: Object
length: 2
__proto__: Array[0]
1: Array[2]
0: "7"
1: Object
id: "7"
name: "BVC (BPTC)"
obe_service_type_id: "2"
__proto__: Object
length: 2
其他回答
输入是对象,输出是对象,使用lodash & js内置库,降序或升序选项,不改变输入对象
Eg输入输出
{
"a": 1,
"b": 4,
"c": 0,
"d": 2
}
{
"b": 4,
"d": 2,
"a": 1,
"c": 0
}
实现
const _ = require('lodash');
const o = { a: 1, b: 4, c: 0, d: 2 };
function sortByValue(object, descending = true) {
const { max, min } = Math;
const selector = descending ? max : min;
const objects = [];
const cloned = _.clone(object);
while (!_.isEmpty(cloned)) {
const selectedValue = selector(...Object.values(cloned));
const [key, value] = Object.entries(cloned).find(([, value]) => value === selectedValue);
objects.push({ [key]: value });
delete cloned[key];
}
return _.merge(...objects);
}
const o2 = sortByValue(o);
console.log(JSON.stringify(o2, null, 2));
我遵循slebetman给出的解决方案(去阅读它的所有细节),但调整,因为你的对象是非嵌套的。
// First create the array of keys/values so that we can sort it:
var sort_array = [];
for (var key in list) {
sort_array.push({key:key,value:list[key]});
}
// Now sort it:
sort_array.sort(function(x,y){return x.value - y.value});
// Now process that object with it:
for (var i=0;i<sort_array.length;i++) {
var item = list[sort_array[i].key];
// now do stuff with each item
}
为了完整起见,这个函数返回对象属性的排序数组:
function sortObject(obj) {
var arr = [];
for (var prop in obj) {
if (obj.hasOwnProperty(prop)) {
arr.push({
'key': prop,
'value': obj[prop]
});
}
}
arr.sort(function(a, b) { return a.value - b.value; });
//arr.sort(function(a, b) { return a.value.toLowerCase().localeCompare(b.value.toLowerCase()); }); //use this to sort as strings
return arr; // returns array
}
var list = {"you": 100, "me": 75, "foo": 116, "bar": 15};
var arr = sortObject(list);
console.log(arr); // [{key:"bar", value:15}, {key:"me", value:75}, {key:"you", value:100}, {key:"foo", value:116}]
JSFiddle上面的代码在这里。此解决方案基于本文。
更新的小提琴排序字符串是在这里。您可以从它中删除额外的. tolowercase()转换,以便区分大小写的字符串比较。
对象按值排序(DESC)
function sortObject(list) {
var sortable = [];
for (var key in list) {
sortable.push([key, list[key]]);
}
sortable.sort(function(a, b) {
return (a[1] > b[1] ? -1 : (a[1] < b[1] ? 1 : 0));
});
var orderedList = {};
for (var i = 0; i < sortable.length; i++) {
orderedList[sortable[i][0]] = sortable[i][1];
}
return orderedList;
}
按值排序对象属性
Const obj ={你:100,我:75,foo: 116, bar: 15}; const keysSorted = Object.keys(obj)。排序((a, b) => obj[a] - obj[b]); Const result = {}; keysSorted。forEach(key => {result[key] = obj[key];}); 文档。write('Result: ' + JSON.stringify(Result));
期望的输出:
{"bar":15,"me":75,"you":100,"foo":116}
引用:
按值排序对象属性 将数组转换为对象