将对象存储在javascript数组中

Question

我要存储在数组中的对象obj中没有几个对象。在这种情况下，我正在实现push（），但它没有给出正确的输出。有人可以建议实现相同方法的方法。

var obj ={
car:{
maruti: {wheels: 4, mileage:15},
dezire: {wheels: 4, mileage:19}
    },

bike:{
suzuki:{wheels: 2, mileage:45},
honda:{wheels: 2, mileage:85}
     } 
         }

预期输出：

var obj ={
car:[{
maruti: {wheels: 4, mileage:15},
dezire: {wheels: 4, mileage:19}
    }],

bike:[{
suzuki:{wheels: 2, mileage:45},
honda:{wheels: 2, mileage:85}
     } 
         }]

Answer 1

您可以将对象的键简化为具有数组中值的对象，如下所示：

const obj = {car:{maruti:{wheels:4,mileage:15},dezire:{wheels:4,mileage:19}},bike:{suzuki:{wheels:2,mileage:45},honda:{wheels:2,mileage:85}}},

res = Object.keys(obj).reduce((acc, key) => ({...acc, [key]:[obj[key]]}), {});
console.log(res);

但是，请注意，对象没有存储保证的顺序，因此生成的对象可能与您输入的顺序不同。

Answer 2

只需要将[]的每个值放在obj周围。

var obj ={
car:{
    maruti: {wheels: 4, mileage:15},
     dezire: {wheels: 4, mileage:19}
},

bike:{
  suzuki:{wheels: 2, mileage:45},
  honda:{wheels: 2, mileage:85}
     } 
}
for(let key in obj){
	obj[key] = [obj[key]]
}
console.log(obj)

Answer 3

像这样简单地使用Object.keys()：

 

var obj ={
car:{
maruti: {wheels: 4, mileage:15},
dezire: {wheels: 4, mileage:19}
},

bike:{
suzuki:{wheels: 2, mileage:45},
honda:{wheels: 2, mileage:85}
 } 
     }

Object.keys(obj).forEach(key => obj[key] = [obj[key]]);

console.log(obj);

 

对于按里程对车辆进行排序：

 

var obj ={
car:{
maruti: {wheels: 4, mileage:15},
dezire: {wheels: 4, mileage:19}
},

bike:{
suzuki:{wheels: 2, mileage:45},
honda:{wheels: 2, mileage:85}
 } 
     }

Object.keys(obj).forEach(key => obj[key] = [obj[key]]);

Object.keys(obj).forEach(key => obj[key].sort((a, b) => a.mileage - b.mileage));

console.log(obj);