javascript - 重新创建对象数组的方法返回重复相同对象的相同数组

Question

我正在开发一个函数，该函数将接受一个扁平嵌套对象数组并返回另一个数组，并重命名对象属性。

例如，这个输入:

[

{
 id: 13,
 student_name: 'John',
 parents.mother: 'Mia',
 parents.father: 'Milo',
 parents.mother.mother_education: 'msc',
 parents.father.father_education: 'bachelor',
},
{
 id: 13,
 student_name: 'Erica',
 parents.mother: 'Lea',
 parents.father: 'Theo',
 parents.mother.mother_education: 'bachelor',
 parents.father.father_education: 'high school',
},
...... 

]

应该返回:

[

{
 id: 13,
 student_name: 'John',
 mother: 'Mia',
 father: 'Milo',
 mother_education: 'msc',
 father_education: 'bachelor',
},
{
 id: 13,
 student_name: 'Erica',
 mother: 'Lea',
 father: 'Theo',
 mother_education: 'bachelor',
 father_education: 'high school',
},
...... 

]

到目前为止的代码:

function format_object(myobj){

    var raw_result = []; //the final variable - an array of objects
    var raw_obj = {}; //every object is kept here temporarly
    var depth = 0; //depth of the attribute name

    for(var i = 0; i< myobj.length; i++){ //for each object
        for(var attributename in myobj[i]){ //for each attribute
            depth = attributename.split(".").length-1; //calculate name depth
            if(depth == 0){ 
                raw_obj[attributename] = myobj[i][attributename]; //for simple attribute names, just copy them on the temp object
            }
            else{
                new_attribute = attributename.split('.')[depth] //for complex names, split last word
                raw_obj[new_attribute] = myobj[i][attributename];
            }
        }
        raw_result.push(raw_obj); //add the object we just created into the final variable
    }
    return raw_result;
}

打印我创建的 raw_object，我在每次迭代中得到正确的对象。然而，最终变量仅由第一个对象组成，重复了 n 次。

Answer 1

在循环的每次迭代中都需要一个新的 raw_object，否则您将不断更改同一对象的属性。

当您将对象推送到数组时，它推送的是一个引用，而不是副本。

所以你最终得到一个数组，其中每个元素都是对完全相同的单个对象的引用

var raw_result = []; //the final variable - an array of objects   
var depth = 0; //depth of the attribute name

for(var i = 0; i< myobj.length; i++){ //for each object

    var raw_obj = {}; // new object
    .....