使用递归从嵌套对象中获取值

Question

我有一个JS对象data，从该对象数组中，我需要获取位于“ limitBreakup”数组内的“ amount”值。我已经使用.map()完成了，但是我很想知道使用Recursion

来实现相同的实现

var data = [
   {
      "limitRequirementId":"123",
      "facilityType":"cc",
      "amount":800000,
      "existingRoi":12,
      "existingPf":12100,
      "repoRate":5,
      "spread":10,
      "tenure":24,
      "margin":10000,
      "loanVariable":{
         "type":"roi/commission",
         "value":15
      },
      "limitBreakup":[
         {
            "limitRequirementId":"13",
            "facilityType":"cc",
            "repoRate":5,
            "amount":8000,
            "spread":10,
            "tenure":24,
            "margin":100,
            "loanVariable":{
               "type":"roi/commission",
               "value":15
            }
         },
         {
            "limitRequirementId":"22",
            "facilityType":"LC",
            "repoRate":4,
            "amount":900,
            "spread":6,
            "tenure":21,
            "margin":15,
            "loanVariable":{
               "type":"roi/commission",
               "value":10
            }
         }
      ]
   },
   {
      "limitRequirementUniqueId":"13",
      "limitRequirementId":"13",
      "facilityType":"lc",
      "amount":900000,
      "existingRoi":10,
      "existingPf":1000,
      "repoRate":3,
      "spread":1,
      "tenure":21,
      "margin":1000,
      "loanVariable":{
         "type":"roi/commission",
         "value":15
      },
      "limitBreakup":[
         {
            "limitRequirementId":"35",
            "facilityType":"CC",
            "repoRate":6,
            "amount":600,
            "spread":8,
            "tenure":28,
            "margin":13,
            "loanVariable":{
               "type":"roi/commission",
               "value":14
            }
         }
      ]
   }
]

使用常规迭代的我的解决方案有效：

data.forEach((d, i)=>{
    let limitBreakup = d.limitBreakup;
   if(Array.isArray(limitBreakup)){
limitBreakup.forEach((l)=>{  console.log(l, '->', l.amount)  })
    }else{
        console.log(limitBreakup, 'else->', limitBreakup.amount) 
  }
   //console.log(d.limitBreakup);

})

但是使用递归，我已经中途了：

https://jsfiddle.net/1g98sLw3/2/

http://www.mocky.io/v2/5ea974eb3400005e003f0203（由于json对象很大，因此我已粘贴到放了mathy.io中以供参考）

Answer 1

这样的事情应该起作用

演示证明：https://jsfiddle.net/t1z36d0u/

您需要循环来遍历对象，然后在满足条件时将它们添加到数组中

let amountArr = [];

function getMyAmount(data) {
  for (let i = 0; i < data.length; i++) {
     const obj= data[i];
    if (obj.hasOwnProperty('limitBreakup')) {
      if (obj.hasOwnProperty('amount')) {
        amountArr.push(obj.amount)
      } else {
        console.log(obj)
        getMyAmount(obj.limitBreakup)
      }
    }
  }
};
getMyAmount(data)