Question

如何在javascript中查找和替换深层嵌套数组对象

我有一个示例对象名称obj，并用id, in , and out（obj_res）过滤了该对象。如预期的输出所示，如何在JavaScript的id fund中使用obj_res查找和更新特定的obj

我陷入困境需要帮助，该如何使用javascript

var obj_res = getValue("bank", "bank", "trans");
function getValue(send, receive, id){
   const temp = obj.map(e => Object.entries(e).map(([k, val]) => val)).flat(3)
    result_obj = temp.filter(x=>x.in ==send && && x=>x.out ==receive && x.id == id);
  return result_obj;}

//whole object input
var obj = [{
    "btob": [{
      "id": "trans",
      "in": "bank",
      "out": "bank",
      "value": 10,
    },{
      "id": "fund",
      "in": "bank",
      "out": "bank",
      "value": 10
    }],
    "ctob": [{
      "id": "trans",
      "in": "credit",
      "out": "bank",
      "value": 20
    },{
      "id": "fund",
      "in": "credit",
      "out": "bank",
      "value": 10
    }]
}]

//resultant obj after filter by id , in ,out 
var obj_res =[{
  "id": "trans",
  "in": "bank",
  "out": "bank",
  "value": 10
 },{
 "id": "fund",
 "in": "bank",
 "out": "bank",
 "value": 10
}]

 Expected Output:
  res=[{
  "id": "trans",
  "in": "bank",
  "out": "bank",
  "value": 10
 },{
"id": "fund",
"in": "credit",
"out": "bank",
"value": 10
}]

Answer 1

晚些晚了，嘿。我也需要修改深层嵌套的对象，并且找不到用于此目的的可接受工具。然后，我将其制成并将其推送到npm。

https://www.npmjs.com/package/find-and

这个小库可以帮助以Lodash的方式修改嵌套对象。例如，

var findAnd = require("find-and");

const obj_res =[{
  "id": "trans",
  "in": "bank",
  "out": "bank",
  "value": 10
 },{
 "id": "fund",
 "in": "bank",
 "out": "bank",
 "value": 10
}];

findAnd.changeProps(obj_res, { id: 'fund' }, { in: 'credit' });

精确地输出您想要的。

https://runkit.com/arfeo/find-and

希望这可以帮助其他人。

Answer 2

如果您认为只有一个，请使用find()获得一审。否则，请使用filter()并遍历每个对象以修改每个匹配对象的属性

var obj_res = [{
  "id": "trans",
  "in": "bank",
  "out": "bank",
  "value": 10
}, {
  "id": "fund",
  "in": "bank",
  "out": "bank",
  "value": 10
}]


var fund = obj_res.find(({id}) => id === 'fund'); // returns array element or false

if (fund) {
  fund.in = 'XXXXX';
  console.log(obj_res)
}

在JavaScript中查找并替换嵌套数组对象

2 个答案: