如何比较角度来自JSON文件的行？

Question

我在JSON文件中有这个项目，我需要比较我有Curr或Prev值的地方，并比较它们是否等于。这个算法是用角度5但我无法做到这一点，我用httpClient做了加载函数示例：

[{
    "id": 1,
    "comparisonDate": "2017-06-22",
    "milestone": "CURR_PREV",
    "udDomain": "BASIS",
    "udIdentifier": "332A251000.01",
    "rpt": "D70",
    "approvedCurr": true,
    "approvedPrev": null,
    "commercialReferenceCurr": "BASIS - 01.01.2007",
    "commercialReferencePrev": null,
    "customizationImpactCurr": null,
    "customizationImpactPrev": null,
    "deliveryTypeCurr": null,
    "deliveryTypePrev": null,
    "aircraftId": 184,
    "aircraftSapId": "580652",
    "aircraftName": "BUL 011",
    "aircraftSerialNumber": "02713",
    "quantityCurr": "1",
    "quantityPrev": null,
    "statusCurr": "O",
    "statusPrev": null,
    "typeModification": "CREATION",
    "validityCurr": "V",
    "validityPrev": null
}, {
    "id": 2,
    "comparisonDate": "2017-06-22",
    "milestone": "CURR_PREV",
    "udDomain": "BASIS",
    "udIdentifier": "332A270028.01",
    "rpt": "E15",
    "approvedCurr": true,
    "approvedPrev": null,
    "commercialReferenceCurr": "BASIS - 01.01.2007",
    "commercialReferencePrev": null,
    "customizationImpactCurr": null,
    "customizationImpactPrev": null,
    "deliveryTypeCurr": null,
    "deliveryTypePrev": null,
    "aircraftId": 184,
    "aircraftSapId": "580652",
    "aircraftName": "BUL 011",
    "aircraftSerialNumber": "02713",
    "quantityCurr": "1",
    "quantityPrev": null,
    "statusCurr": "O",
    "statusPrev": null,
    "typeModification": "CREATION",
    "validityCurr": "V",
    "validityPrev": null
}]

这应该是使用lodash。

Answer 1

我假设你想要这样的东西

• 对于数组中的每个对象
• 以“Curr”结尾的过滤键
• 每个获取Prev属性
• 将它与curr属性进行比较

  let obj = [{
  "id": 1,
  "comparisonDate": "2017-06-22",
  "milestone": "CURR_PREV",
  "udDomain": "BASIS",
  "udIdentifier": "332A251000.01",
  "rpt": "D70",
  "approvedCurr": true,
  "approvedPrev": null,
  "commercialReferenceCurr": "BASIS - 01.01.2007",
  "commercialReferencePrev": null,
  "customizationImpactCurr": null,
  "customizationImpactPrev": null,
  "deliveryTypeCurr": null,
  "deliveryTypePrev": null,
  "aircraftId": 184,
  "aircraftSapId": "580652",
  "aircraftName": "BUL 011",
  "aircraftSerialNumber": "02713",
  "quantityCurr": "1",
  "quantityPrev": null,
  "statusCurr": "O",
  "statusPrev": null,
  "typeModification": "CREATION",
  "validityCurr": "V",
  "validityPrev": null
  }, {
  "id": 2,
  "comparisonDate": "2017-06-22",
  "milestone": "CURR_PREV",
  "udDomain": "BASIS",
  "udIdentifier": "332A270028.01",
  "rpt": "E15",
  "approvedCurr": true,
  "approvedPrev": null,
  "commercialReferenceCurr": "BASIS - 01.01.2007",
  "commercialReferencePrev": null,
  "customizationImpactCurr": null,
  "customizationImpactPrev": null,
  "deliveryTypeCurr": null,
  "deliveryTypePrev": null,
  "aircraftId": 184,
  "aircraftSapId": "580652",
  "aircraftName": "BUL 011",
  "aircraftSerialNumber": "02713",
  "quantityCurr": "1",
  "quantityPrev": null,
  "statusCurr": "O",
  "statusPrev": null,
  "typeModification": "CREATION",
  "validityCurr": "V",
  "validityPrev": null
   }];
  
  
  obj.forEach(x=>{
    Object.keys(x)
     .filter(y=>y.endsWith("Curr"))
     .forEach(y=>{
       let prevProp = y.replace("Curr", "Prev")
       console.log(y, x[y]);
       console.log(prevProp ,x[prevProp ]);
       if(x[y]===x[prevProp ]){
         //equal
       }else{
         //not equal
       }
   })
  
  })

你可以使用lodash的_.forEach，_.Keys，_.filter，但我认为这没什么意义。