Javascript中的嵌套多维数组

Question

给出以下代码：

<script type="text/javascript">
    var arr = [];
    var names = [{name : 'George'}, {name : 'Ringo'}, {name : 'Paul'}, {name : 'John'}];
    var surnames = [{surname : 'Harrison'}, {surname : 'Starr'}, {surname : 'McCartney'}, {surname : 'Lennon'}];

    for (i = 0; i < names.length; i++) {
            arr['firstname'] = names[i];
        for (j = 0; j < surnames.length; j++) {
            arr['firstname']['surname'] = surnames[j];
            arr['firstname']['surname']['index'] = i;
            console.log(arr);
        }
    }
</script>

运行时，内部循环中的输出将仅在所有条目上显示姓氏array（Lennon）和i（3）的最后一个值。 我要实现的输出是每个姓名的姓氏将分配给所有名字（例如John Harrison，John Starr等），并且index（i）将从0递增到3。谢谢。

Answer 1

你想要这样的东西吗？

 var arr = []; var names = [{ name: 'George' }, { name: 'Ringo' }, { name: 'Paul' }, { name: 'John' }]; var surnames = [{ surname: 'Harrison' }, { surname: 'Starr' }, { surname: 'McCartney' }, { surname: 'Lennon' }]; for (i = 0; i < names.length; i++) { arr.push({ index: i, firstname: names[i].name, surname: surnames[i].surname }); } console.log(arr); 

Answer 2

这样尝试，

for (i = 0; i < names.length; i++) {
       var obj = new Object;
        obj['name'] = names[i];
        obj['name']['surname'] = surnames[i].surname;
        obj['index'] = i;
        arr.push(obj);

}
   console.log(arr);

Answer 3

看起来您想要所有姓氏的直角乘积。

尝试这个

  var arr = []; var names = [{ name: 'George' }, { name: 'Ringo' }, { name: 'Paul' }, { name: 'John' }]; var surnames = [{ surname: 'Harrison' }, { surname: 'Starr' }, { surname: 'McCartney' }, { surname: 'Lennon' }]; for (i = 0; i < names.length; i++) { for (j = 0; j < surnames.length; j++) { var tmpObj = JSON.parse(JSON.stringify(names[i])); tmpObj['surname'] = surnames[j].surname; tmpObj['index'] = i; arr.push(tmpObj); } } console.log(arr); 

另外，您也可以

Object.create(names[i]) 

代替

JSON.parse(JSON.stringify(names[i]));