我有两组JavaScript对象。我想比较object1和object2，然后获取object1中所有键的列表，但不是object2中的键。我正在寻找资源来帮助我，但我最终只找到了简单对象的比较函数。我要比较的对象有很多嵌套。我在底部加了一个例子。
我如何制作比较这两个对象的功能？是否有可能创建一个灵活的函数，如果对象要更改并包含更多嵌套，它也会起作用吗？
const object1 = {
"gender": "man",
"age": 33,
"origin": "USA",
"jobinfo": {
"type": "teacher",
"school": "Wisconsin"
},
"children": [
{
"name": "Daniel",
"age": 12,
"pets": [
{
"type": "cat",
"name": "Willy",
"age": 2
},
{
"type": "dog",
"name": "jimmie",
"age": 5
}
]
},
{
"name": "Martin",
"age": 14,
"pets": [
{
"type": "bird",
"name": "wagner",
"age": 12
}
]
}
],
"hobbies": {
"type": "football",
"sponsor": {
"name": "Pepsi",
"sponsorAmount": 1000,
"contact": {
"name": "Leon",
"age": 59,
"children": [
{
"name": "James",
"pets": [
{
"type": "dog",
"age": 4
}
]
}
]
}
}
}
}
const object2 = {
"gender": "man",
"jobinfo": {
"type": "teacher"
},
"children": [
{
"name": "Daniel",
"age": 12,
"pets": [
{
"type": "cat",
"name": "Willy",
"age": 2
},
{
"type": "dog",
"name": "jimmie",
"age": 5
}
]
}
]
}
所以我想通过比较这两个对象来实现，在这种情况下，有一个数组返回，它由object1中的键组成，但不包含object2。所以数组看起来像这样。
["age", "hobbies", "type", "sponsor", "name", "sponsorAmount", "contact", "name", "age", "children", "name", "pets", "type", "age"].
这是我到目前为止所得到的。这有点工作。但它并没有打印年龄，例如，因为年龄是存在于多个嵌套对象中的属性。 jsfiddle：https://jsfiddle.net/rqdgojq2/
我看过以下资源：
答案 0 :(得分：1)
使用 设置 对象和自定义getAllKeyNames()递归函数的复杂解决方案，以从指定对象获取所有唯一键名称：
var object1 = {"gender":"man","age":33,"origin":"USA","jobinfo":{"type":"teacher","school":"Wisconsin"},"children":[{"name":"Daniel","age":12,"pets":[{"type":"cat","name":"Willy","age":2},{"type":"dog","name":"jimmie","age":5}]},{"name":"Martin","age":14,"pets":[{"type":"bird","name":"wagner","age":12}]}],"hobbies":{"type":"football","sponsor":{"name":"Pepsi","sponsorAmount":1000,"contact":{"name":"Leon","age":59,"children":[{"name":"James","pets":[{"type":"dog","age":4}]}]}}}},
object2 = {"gender":"man","age":33,"origin":"USA","jobinfo":{"type":"teacher","school":"Wisconsin"},"children":[{"name":"Daniel","age":12,"pets":[{"type":"cat","name":"Willy","age":2},{"type":"dog","name":"jimmie","age":5}]}]};
function getAllKeyNames(o, res){
Object.keys(o).forEach(function(k){
if (Object.prototype.toString.call(o[k]) === "[object Object]") {
getAllKeyNames(o[k], res);
} else if (Array.isArray(o[k])) {
o[k].forEach(function(v){
getAllKeyNames(v, res);
});
}
res.add(k);
});
}
var o1Keys = new Set(), o2Keys = new Set();
getAllKeyNames(object1, o1Keys); // unique keys of object1
getAllKeyNames(object2, o2Keys); // unique keys of object2
// get a list of all the keys that are in object1, but not in object2
var diff = [...o1Keys].filter((x) => !o2Keys.has(x));
console.log(diff);
答案 1 :(得分：1)
感谢您的反馈。 我最终解决了这个问题，并从罗马人的回答中获得了很多灵感。
const compareObjects = (obj1, obj2) => {
function getAllKeyNames(o, arr, str){
Object.keys(o).forEach(function(k){
if (Object.prototype.toString.call(o[k]) === "[object Object]") {
getAllKeyNames(o[k], arr, (str + '.' + k));
} else if (Array.isArray(o[k])) {
o[k].forEach(function(v){
getAllKeyNames(v, arr, (str + '.' + k));
});
}
arr.push(str + '.' + k);
});
}
function diff(arr1, arr2) {
for(let i = 0; i < arr2.length; i++) {
arr1.splice(arr1.indexOf(arr2[i]), 1);
}
return arr1;
}
const o1Keys = [];
const o2Keys = [];
getAllKeyNames(obj1, o1Keys, ''); // get the keys from schema
getAllKeyNames(obj2, o2Keys, ''); // get the keys from uploaded file
const missingProps = diff(o1Keys, o2Keys); // calculate differences
for(let i = 0; i < missingProps.length; i++) {
missingProps[i] = missingProps[i].replace('.', '');
}
return missingProps;
}
jsfiddle here：https://jsfiddle.net/p9Lm8b53/
答案 2 :(得分：0)
您可以使用对象进行计数。
function getCount(object, keys, inc) {
Object.keys(object).forEach(function (k) {
if (!Array.isArray(object)) {
keys[k] = (keys[k] || 0) + inc;
if (!keys[k]) {
delete keys[k];
}
}
if (object[k] && typeof object[k] === 'object') {
getCount(object[k], keys, inc)
}
});
}
var object1 = { gender: "man", age: 33, origin: "USA", jobinfo: { type: "teacher", school: "Wisconsin" }, children: [{ name: "Daniel", age: 12, pets: [{ type: "cat", name: "Willy", age: 2 }, { type: "dog", name: "jimmie", age: 5 }] }, { name: "Martin", age: 14, pets: [{ type: "bird", name: "wagner", age: 12 }] }], hobbies: { type: "football", sponsor: { name: "Pepsi", sponsorAmount: 1000, contact: { name: "Leon", age: 59, children: [{ name: "James", pets: [{ type: "dog", age: 4 }] }] } } } },
object2 = { gender: "man", jobinfo: { type: "teacher" }, children: [{ name: "Daniel", age: 12, pets: [{ type: "cat", name: "Willy", age: 2 }, { type: "dog", name: "jimmie", age: 5 }] }] },
count = {};
getCount(object1, count, 1);
getCount(object2, count, -1);
console.log(count);.as-console-wrapper { max-height: 100% !important; top: 0; }