Angular4：连接字符串以在模板中形成动态键

Question

我正在尝试根据 *ngFor 索引在模板内动态创建一个键。

<div *ngFor="let col of table; let i = index">
  <span *ngFor="let row of col; let j = index">
    {{ row.ricj }}
  </span>
</div>

“ricj”中的“i”和“j”实际上是索引“i”和“j”。这可能吗？

原来的表对象就是这样构建的，

makeTable(){
    for(this.c = 0; this.c < this.columnslength; this.c++){
      for(this.r = 0; this.r < this.rowslength; this.r++){
        this.key = "r" + this.r + "c" + this.c;
        this.cell = { [this.key]: this.key };
        this.cols.push(this.cell);
      }
      this.table.push(this.cols);
      this.cols = [];
  }
}

表格对象看起来像这样，

[
   {
      [{ "r0c0": "r0c0" }, { "r1c0": "r1c0" }]
   },
   {
      [{ "r0c1": "r0c1" }, { "r1c1": "r1c1" }]
   }
]

Answer 1

试试这个，

  <div *ngFor="let col of table; let i = index">
    <span *ngFor="let row of col; let j = index">
        {{ row['r' + j + 'c' + i] }}
    </span>
  </div>