javascript - 如何使用lodash将键值对添加到树结构对象

Question

我需要像 json 对象一样在树的末尾添加键值对。

[{
    "name": "minpur",
    "children": [{
        "name": "ppp1",
        "children": [{
            "name": "feeder",
            "children": [{
                "name": "rmu16",
                "children": [{
                    "name": "invt16",
                    "children": [{
                        "aname": "inv 01"
                    }]
                }]
            }]
        }]
    }]
}]

预期

[{
  "name": "minpur",
  "children": [{
    "name": "ppp1",
    "children": [{
      "name": "feeder",
      "children": [{
        "name": "rmu16",
        "children": [{
          "name": "invt16",
          "children": [{
            "aname": "inv 01",
            **
            "value": 300 **
          }]
        }]
      }]
    }]
  }]
}]

试过递归函数如下

let traverse = function(jsonObj) {
  if (jsonObj !== null && typeof jsonObj == "object") {
    return Object.entries(jsonObj).forEach(([key, value]) => {
      if (key != "aname") {
        traverse(value);
      } else {
        return value;
      }
    });
  }
}

Answer 1

检查对象上是否存在 aname 键，如果存在则添加该属性。如果它不使用 Array.forEach() 迭代子项，并在子项上调用遍历。

const traverse = (key, value) => obj => {
  const inner = obj => {
    if(obj.hasOwnProperty(key)) obj.value = value
    else obj.children.forEach(inner)
  }
  
  return inner(obj)
}

const tree = [{"name":"minpur","children":[{"name":"ppp1","children":[{"name":"feeder","children":[{"name":"rmu16","children":[{"name":"invt16","children":[{"aname":"inv 01"}]}]}]}]}]}]

tree.forEach(traverse('aname', 300))

console.log(tree)