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JSON 结构对比可运行案例

评论列表：解释 comments 首部插入导致的多处差异

数组按下标逐项比较。在 comments 开头插入记录后，后续元素位置移动，会产生多处修改和一个尾部新增；这不等于多条业务记录都发生了真实字段变更。需要按 ID 配对时应先在自己的业务逻辑中处理。

浏览器本地处理合成数据同场景 32 个案例 ↗
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示例工作台

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JSON 结构对比修改下方数据后重新运行
运行结果
[
  {
    "op": "replace",
    "path": "/data/comments/0/commentId",
    "oldValue": "demo-comments-1",
    "value": "demo-inserted"
  },
  {
    "op": "replace",
    "path": "/data/comments/0/content",
    "oldValue": "第一条演示评论",
    "value": "新增演示记录"
  },
  {
    "op": "replace",
    "path": "/data/comments/1/commentId",
    "oldValue": "demo-comments-2",
    "value": "demo-comments-1"
  },
  {
    "op": "replace",
    "path": "/data/comments/1/content",
    "oldValue": "第二条演示评论",
    "value": "第一条演示评论"
  },
  {
    "op": "replace",
    "path": "/data/comments/1/likes",
    "oldValue": 8,
    "value": 0
  },
  {
    "op": "replace",
    "path": "/data/comments/1/pinned",
    "oldValue": false,
    "value": true
  },
  {
    "op": "replace",
    "path": "/data/comments/1/moderation",
    "oldValue": "approved",
    "value": "pending"
  },
  {
    "op": "replace",
    "path": "/data/comments/1/thread/parentId",
    "oldValue": "demo-C00",
    "value": null
  },
  {
    "op": "add",
    "path": "/data/comments/1/thread/replies/0",
    "value": "demo-C03"
  },
  {
    "op": "add",
    "path": "/data/comments/2",
    "value": {
      "commentId": "demo-comments-2",
      "content": "第二条演示评论",
      "likes": 8,
      "pinned": false,
      "moderation": "approved",
      "thread": {
        "parentId": "demo-C00",
        "replies": []
      }
    }
  }
]

原例已核验，可修改输入后重新运行。

⌘ / Ctrl + Enter 运行
01

场景与操作说明

评论内容和审核状态不应混用。本文只展示合成文本与结构，不能用样本中的 approved 判断真实内容已通过审核。

likes 是示例点赞数，0 与 null 或缺失的含义不同。

  1. 核对 评论列表 的字段层级，保留 commentId 的字符串类型。
  2. 修改一项输入并运行，观察结果中的值或路径如何变化。
  3. 载入对照样本，复现下面的变化；恢复原例会替换当前输入。
02

对照样本

对照样本交换 A 与 B。观察新增与删除的方向、修改前后值如何反转；没有差异时交换仍无差异。

查看对照输入
{
  "ok": true,
  "data": {
    "comments": [
      {
        "commentId": "demo-inserted",
        "content": "新增演示记录",
        "likes": 0,
        "pinned": true,
        "moderation": "pending",
        "thread": {
          "parentId": null,
          "replies": [
            "demo-C03"
          ]
        }
      },
      {
        "commentId": "demo-comments-1",
        "content": "第一条演示评论",
        "likes": 0,
        "pinned": true,
        "moderation": "pending",
        "thread": {
          "parentId": null,
          "replies": [
            "demo-C03"
          ]
        }
      },
      {
        "commentId": "demo-comments-2",
        "content": "第二条演示评论",
        "likes": 8,
        "pinned": false,
        "moderation": "approved",
        "thread": {
          "parentId": "demo-C00",
          "replies": []
        }
      }
    ],
    "summary": {
      "total": 2,
      "note": null
    }
  }
}
{
  "ok": true,
  "data": {
    "comments": [
      {
        "commentId": "demo-comments-1",
        "content": "第一条演示评论",
        "likes": 0,
        "pinned": true,
        "moderation": "pending",
        "thread": {
          "parentId": null,
          "replies": [
            "demo-C03"
          ]
        }
      },
      {
        "commentId": "demo-comments-2",
        "content": "第二条演示评论",
        "likes": 8,
        "pinned": false,
        "moderation": "approved",
        "thread": {
          "parentId": "demo-C00",
          "replies": []
        }
      }
    ],
    "summary": {
      "total": 2,
      "note": null
    }
  }
}

对照样本的实际结果

[
  {
    "op": "replace",
    "path": "/data/comments/0/commentId",
    "oldValue": "demo-inserted",
    "value": "demo-comments-1"
  },
  {
    "op": "replace",
    "path": "/data/comments/0/content",
    "oldValue": "新增演示记录",
    "value": "第一条演示评论"
  },
  {
    "op": "replace",
    "path": "/data/comments/1/commentId",
    "oldValue": "demo-comments-1",
    "value": "demo-comments-2"
  },
  {
    "op": "replace",
    "path": "/data/comments/1/content",
    "oldValue": "第一条演示评论",
    "value": "第二条演示评论"
  },
  {
    "op": "replace",
    "path": "/data/comments/1/likes",
    "oldValue": 0,
    "value": 8
  },
  {
    "op": "replace",
    "path": "/data/comments/1/pinned",
    "oldValue": true,
    "value": false
  },
  {
    "op": "replace",
    "path": "/data/comments/1/moderation",
    "oldValue": "pending",
    "value": "approved"
  },
  {
    "op": "replace",
    "path": "/data/comments/1/thread/parentId",
    "oldValue": null,
    "value": "demo-C00"
  },
  {
    "op": "remove",
    "path": "/data/comments/1/thread/replies/0",
    "oldValue": "demo-C03"
  },
  {
    "op": "remove",
    "path": "/data/comments/2",
    "oldValue": {
      "commentId": "demo-comments-2",
      "content": "第二条演示评论",
      "likes": 8,
      "pinned": false,
      "moderation": "approved",
      "thread": {
        "parentId": "demo-C00",
        "replies": []
      }
    }
  }
]