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
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
其他回答
另一种解决方法:-
var res = [{"s1":5},{"s2":3},{"s3":8}].sort(function(obj1,obj2){
var prop1;
var prop2;
for(prop in obj1) {
prop1=prop;
}
for(prop in obj2) {
prop2=prop;
}
//the above two for loops will iterate only once because we use it to find the key
return obj1[prop1]-obj2[prop2];
});
//res将有结果数组
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));
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
我已经用自己的方式尝试过了
var maxSpeed = {
car: 300,
bike: 60,
motorbike: 200,
airplane: 1000,
helicopter: 400,
rocket: 8 * 60 * 60
};
var sorted = {}
Object.keys(maxSpeed).sort ((a,b) => maxSpeed[a] - maxSpeed[b]).map(item => sorted[item] = maxSpeed[item]);
console.log(sorted)
以防万一,有人正在寻找保持对象(键和值),使用@Markus R和@James Moran注释的代码引用,只需使用:
var list = {"you": 100, "me": 75, "foo": 116, "bar": 15};
var newO = {};
Object.keys(list).sort(function(a,b){return list[a]-list[b]})
.map(key => newO[key] = list[key]);
console.log(newO); // {bar: 15, me: 75, you: 100, foo: 116}