Question

var A = [{
  id: 1,
  name: "Apple"
}, {
  id: 2,
  name: "Orange"
}, {
  id: 3,
  name: "Mango"
}];

var B = [{
  id: 1,
  name: "Apple"
}, {
  id: 3,
  name: "Mango"
}, {
  id: 4,
  name: "Berry"
}];

我想要添加对象; [{ id: 4, name: "Berry" }
删除对象; [{ id: 2, name: "Orange" }]

请告诉我最简单的方法。我尝试使用数组差异，但是代码太复杂了。感谢。

Answer 1

要进行对象比较，我现在能想到的最简单的方法是＆＃39; stringify＆＃39;它

＆＃13;

var A = [{ id: 1, name: "Apple" }, { id: 2, name: "Orange" }, { id: 3, name: "Mango"}];
var B = [{ id: 1, name: "Apple" }, { id: 3, name: "Mango" }, { id: 4, name: "Berry" }];


var strA = A.map(function(item){return JSON.stringify(item);})
var strB = B.map(function(item){return JSON.stringify(item);})

var addedObjs = strB
                  .filter((item) => strA.indexOf(item) < 0)
                  .map((item) => JSON.parse(item));

var removedObjs = strA
                  .filter((item) => strB.indexOf(item) < 0)
                  .map((item) => JSON.parse(item));


console.log(addedObjs);
console.log(removedObjs);

＆＃13;

从数组javascript获取添加的对象和删除的对象

1 个答案: