合并两个嵌套对象并在侧面连接数组

Question

Is there a build in method that merge two nested objects I make across Object.assign() .
It is not working in my case because my nested object is array .

var obj1 = {
  "name": "Services",
  "category": "Services",
  "subCategory": [{
    "name": "Negative",
    "category": "Negative",
    "subCategory": [{           // only this part differ
      "name": "Expensive",  
      "val": 109,
      "subCategory": null
    }]
  }]
};  


var obj2 = {
  "name": "Services",
  "category": "Services",
  "subCategory": [{
    "name": "Negative",
    "category": "Negative",
    "subCategory": [{            // only this part differ
      "name": "Disorganized",
      "val": 25,
      "subCategory": null
    }]
  }]
};  

It should merge like this

var result = {
  "name": "Services",
  "category": "Services",
  "subCategory": [{
    "name": "Negative",
    "category": "Negative",
    "subCategory": [{          //  array concatenation
      "name": "Disorganized",
      "val": 25,
      "subCategory": null
    }, {
      "name": "Expensive",
      "val": 109,
      "subCategory": null
    }]
  }]
};

Answer 1

Its just a proposal how to deal with same properties and same values and this special data structure, 'name' and 'subCategory' .

{
    "name": "Services",
    "subCategory": [
        {
            "name": "Negative", ...
            "subCategory": [
                {
                    "name": "Expensive", ...
                },
                {
                    "name": "Disorganized", ...
                }
            ]
        }
    ]
}

This solution works with a recursion and adds the elements of 'subCategory' if the name does not match.

 function fuse(target, source) { if (target.name === source.name) { source.subCategory.forEach(function (a) { target.subCategory.some(function (b) { return fuse(b, a); }) || (target.subCategory = target.subCategory.concat(source.subCategory)); }); return true; } } var obj1 = { "name": "Services", "category": "Services", "subCategory": [{ "name": "Negative", "category": "Negative", "subCategory": [{ "name": "Expensive", "val": 109, "subCategory": null }] }] }, obj2 = { "name": "Services", "category": "Services", "subCategory": [{ "name": "Negative", "category": "Negative", "subCategory": [{ "name": "Disorganized", "val": 25, "subCategory": null }] }] }; fuse(obj1, obj2); document.write('<pre>' + JSON.stringify(obj1, 0, 4) + '</pre>');