基于另一个更新JSON格式的JavaScript对象

Having two JSON formatted js-objects:

有两个JSON格式的js-objects:

obj1 = { prop1: 1,
         prop2: 2,
         prop3: 3 }

obj2 = { prop1: 1,
         prop2: 3 }

What is the best js-practise to update obj2 into obj1, that also removes properties? Typically in a jQuery/angular context. Resulting in:

将obj2更新为obj1的最佳js实践是什么,这也删除了属性?通常在jQuery / angular上下文中。导致:

obj1 = { prop1: 1,   // not updated, nor overwritten
         prop2: 3    // updated
       }             // prop3 removed

Must also deal with nested objects and arrays.

还必须处理嵌套对象和数组。

3 个解决方案

#1

Try this:

function merge_objects(obj1,obj2){
    for (var attr in obj2) { obj1[attr] = obj2[attr]; }
    for (var attr in obj1) { if(!obj2[attr]){ delete obj1[attr]} }
    return obj1;
}

#2

To compare objects you can use angular.equals(obj1, obj2). For merging you can check angular.extend but it won't delete missing elements.

要比较对象,可以使用angular.equals(obj1,obj2)。对于合并,您可以检查angular.extend,但不会删除缺少的元素。

#3

If you want to copy(or clone including arrays/child objects) contents of object2 into object1, try using jquery extend()

如果要将object2的内容(或克隆包括数组/子对象)复制到object1,请尝试使用jquery extend()

Please find jsfiddle [here][2]

#1