如何在循环中生成带序号键的JSON数据结构？

原代码与当前输出 #

原JavaScript代码：

let paragraph_json = [];

for (let paragraph = 1; paragraph <= 3; paragraph++) {
  paragraph_json.push({
    text: `this is paragraph ${paragraph}`,
  });
}

res.json({
  data: paragraph_json,
});

当前输出JSON：

{
    "data": [
      {
        "text": "this is paragraph 1"
      }, 
      {
        "text": "this is paragraph 2"
      }, 
      {
        "text": "this is paragraph 3"
      }
    ]
}

需求说明 #

需要生成带段落序号作为键的JSON结构，注意你期望的格式中data应为对象而非数组（JSON数组不支持键值对形式的元素），目标格式如下：

{
    "data": {
      "1": {
        "text": "this is paragraph 1"
      }, 
      "2": {
        "text": "this is paragraph 2"
      }, 
      "3": {
        "text": "this is paragraph 3"
      }
    }
}

修改后的代码 #

把paragraph_json从数组换成对象，循环内直接给对象添加对应序号的键值对：

let paragraph_json = {}; // 将数组替换为对象

for (let paragraph = 1; paragraph <= 3; paragraph++) {
  // 用段落序号作为对象键，赋值对应的段落对象
  paragraph_json[paragraph] = {
    text: `this is paragraph ${paragraph}`,
  };
}

res.json({
  data: paragraph_json,
});

最终输出结果 #

运行修改后的代码，会生成符合需求的JSON：

{
    "data": {
      "1": {
        "text": "this is paragraph 1"
      }, 
      "2": {
        "text": "this is paragraph 2"
      }, 
      "3": {
        "text": "this is paragraph 3"
      }
    }
}

内容的提问来源于stack exchange，提问作者Marwan Ansari