Question

我想在javascript中将多个对象添加到单个键中期望的输出：

{1:[{city_name:'XYZ',city_id:21},{city_name:'ABC',city_id:2}]}

代码段：

for(var key = 1; key <= largest ; key++ )
 {  

    for(var i =0; i<subservices.length ; i++)
    {                             
        if(key == subservices[i].from_city_order )
       {                        
            if(!(key in childMap)) {                                       
                childMap[key] =(cityIdMap[subservices[i].to_city_id]);     
            } else if(key in childMap ){                                   
              //same key value should have multiple objects in the array    
            }                                                                  
      }                                                                      
   } 
}

Answer 1

当然，同一个键不能有多个对象。这是关键价值关系的重点。您可以拥有的是值为数组的地图，因此您的地图可能如下所示：

cityZipCodesMap = {
  'London' => [111,222,333],
  'NY' => [444], 
  'LA' => [555,666]
}

// With this you can do something like this:

if(!(cityName in cityZipCodesMap)){
   cityZipCodesMap[cityName] = [];
}else{
   cityZipCodesMap[cityName].push(newZipCode);
}

将多个对象添加到单个键

1 个答案: