javascript - 尝试添加数组中某些键的值以在我的 React 应用程序中使用

Question

我有一个对象数组。我想添加一个特定的 key /对的累积存储总量。

“分配存储”:200，+ “分配存储”:585，+ “分配存储”:103547，= 104,242

[{
  "MonitoringState": "disabled",
  "State_Code": 16,
  "State_Name": "running",
  "EbsOptimized": false,
  "EnaSupport": true,
  "AllocateStorage": 200,
  "SourceDestCheck": true,
  "SpotInstanceRequestId": "None",
  "SriovNetSupport": "None",
  "StateReason_Code": "None",
  "StateReason_Message": "None"
},
{
  "MonitoringState": "disabled",
  "State_Code": 16,
  "State_Name": "stopped",
  "EbsOptimized": false,
  "EnaSupport": true,
  "AllocateStorage": 585,
  "SourceDestCheck": true,
  "SpotInstanceRequestId": "None",
  "SriovNetSupport": "None",
  "StateReason_Code": "None",
  "StateReason_Message": "None"
},
{
  "MonitoringState": "disabled",
  "State_Code": 16,
  "State_Name": "running",
  "EbsOptimized": false,
  "EnaSupport": true,
  "AllocateStorage": 103547,
  "SourceDestCheck": true,
  "SpotInstanceRequestId": "None",
  "SriovNetSupport": "None",
  "StateReason_Code": "None",
  "StateReason_Message": "None"
}
]

解决这个问题的最佳方法是什么？我已经研究过 .reduce 但示例仅显示添加整个数组。

Answer 1

减少是可行的方法:

let total = arr.reduce((total, obj) => {
    return total += obj.AllocateStorage
}, 0);