小编Ked*_*rni的帖子

我正在尝试以表格形式迭代列表。以下列表应使用以下表格以表格形式呈现*ngFor：

输入/输出

let list = [
  {
    "key1": {
      "subkey1": [
        1,
        2,
        3,
        1
      ],
      "subkey2": [
        3,
        2,
        3,
        4
      ]
    }
  },
  {
    "key2": {
      "subkey1": [
        1
      ],
      "subkey2": [
        0
      ]
    }
  }
]

表格格式（表格应以这种方式呈现）：

Categories | subkey1 | subkey2

key1       | 1,2,3,1 | 3,2,3,4

key2       |  1      |  0

我试过了但是错了：

我尝试在component.html中进行迭代的代码：

 <table border="1">
      <thead>
          <tr>
              <th>Categories</th>
              <th *ngFor="let each of categoriesHeading"> {{each}} </th>  // Array of subkeys
            </tr>
      </thead>
      <tbody *ngFor="let each …

I have heard that JavaScript does not support associative arrays. Is it true
I mean:

assocArray = [
  {a: ""},
  {b: ""},
  {c: ""}
];

how to get the keys of above assocArray?

I tried using:

for (each in assocArray) {}

it gives: 0, 1, 2