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JSON 结构对比可运行案例

课程目录：解释 courses 首部插入导致的多处差异

数组按下标逐项比较。在 courses 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。

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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/courses/0/courseId",
    "oldValue": "demo-courses-1",
    "value": "demo-inserted"
  },
  {
    "op": "replace",
    "path": "/data/courses/0/title",
    "oldValue": "演示 JSON 入门",
    "value": "新增演示记录"
  },
  {
    "op": "replace",
    "path": "/data/courses/1/courseId",
    "oldValue": "demo-courses-2",
    "value": "demo-courses-1"
  },
  {
    "op": "replace",
    "path": "/data/courses/1/title",
    "oldValue": "演示接口实践",
    "value": "演示 JSON 入门"
  },
  {
    "op": "replace",
    "path": "/data/courses/1/lessonCount",
    "oldValue": 12,
    "value": 6
  },
  {
    "op": "replace",
    "path": "/data/courses/1/published",
    "oldValue": false,
    "value": true
  },
  {
    "op": "replace",
    "path": "/data/courses/1/level",
    "oldValue": "advanced",
    "value": "beginner"
  },
  {
    "op": "replace",
    "path": "/data/courses/1/syllabus/chapters/0",
    "oldValue": "契约",
    "value": "对象"
  },
  {
    "op": "replace",
    "path": "/data/courses/1/syllabus/chapters/1",
    "oldValue": "校验",
    "value": "数组"
  },
  {
    "op": "add",
    "path": "/data/courses/2",
    "value": {
      "courseId": "demo-courses-2",
      "title": "演示接口实践",
      "lessonCount": 12,
      "published": false,
      "level": "advanced",
      "syllabus": {
        "chapters": [
          "契约",
          "校验"
        ],
        "language": "zh-CN"
      }
    }
  }
]

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

课程目录中的发布状态、章节数和大纲是不同字段。样本只用于结构练习，不代表实际提供这些课程。

lessonCount 是示例课时数，不由 chapters 数组长度自动推算。

  1. 核对 课程目录 的字段层级，保留 courseId 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": {
    "courses": [
      {
        "courseId": "demo-inserted",
        "title": "新增演示记录",
        "lessonCount": 6,
        "published": true,
        "level": "beginner",
        "syllabus": {
          "chapters": [
            "对象",
            "数组"
          ],
          "language": "zh-CN"
        }
      },
      {
        "courseId": "demo-courses-1",
        "title": "演示 JSON 入门",
        "lessonCount": 6,
        "published": true,
        "level": "beginner",
        "syllabus": {
          "chapters": [
            "对象",
            "数组"
          ],
          "language": "zh-CN"
        }
      },
      {
        "courseId": "demo-courses-2",
        "title": "演示接口实践",
        "lessonCount": 12,
        "published": false,
        "level": "advanced",
        "syllabus": {
          "chapters": [
            "契约",
            "校验"
          ],
          "language": "zh-CN"
        }
      }
    ],
    "summary": {
      "total": 2,
      "note": null
    }
  }
}
{
  "ok": true,
  "data": {
    "courses": [
      {
        "courseId": "demo-courses-1",
        "title": "演示 JSON 入门",
        "lessonCount": 6,
        "published": true,
        "level": "beginner",
        "syllabus": {
          "chapters": [
            "对象",
            "数组"
          ],
          "language": "zh-CN"
        }
      },
      {
        "courseId": "demo-courses-2",
        "title": "演示接口实践",
        "lessonCount": 12,
        "published": false,
        "level": "advanced",
        "syllabus": {
          "chapters": [
            "契约",
            "校验"
          ],
          "language": "zh-CN"
        }
      }
    ],
    "summary": {
      "total": 2,
      "note": null
    }
  }
}

对照样本的实际结果

[
  {
    "op": "replace",
    "path": "/data/courses/0/courseId",
    "oldValue": "demo-inserted",
    "value": "demo-courses-1"
  },
  {
    "op": "replace",
    "path": "/data/courses/0/title",
    "oldValue": "新增演示记录",
    "value": "演示 JSON 入门"
  },
  {
    "op": "replace",
    "path": "/data/courses/1/courseId",
    "oldValue": "demo-courses-1",
    "value": "demo-courses-2"
  },
  {
    "op": "replace",
    "path": "/data/courses/1/title",
    "oldValue": "演示 JSON 入门",
    "value": "演示接口实践"
  },
  {
    "op": "replace",
    "path": "/data/courses/1/lessonCount",
    "oldValue": 6,
    "value": 12
  },
  {
    "op": "replace",
    "path": "/data/courses/1/published",
    "oldValue": true,
    "value": false
  },
  {
    "op": "replace",
    "path": "/data/courses/1/level",
    "oldValue": "beginner",
    "value": "advanced"
  },
  {
    "op": "replace",
    "path": "/data/courses/1/syllabus/chapters/0",
    "oldValue": "对象",
    "value": "契约"
  },
  {
    "op": "replace",
    "path": "/data/courses/1/syllabus/chapters/1",
    "oldValue": "数组",
    "value": "校验"
  },
  {
    "op": "remove",
    "path": "/data/courses/2",
    "oldValue": {
      "courseId": "demo-courses-2",
      "title": "演示接口实践",
      "lessonCount": 12,
      "published": false,
      "level": "advanced",
      "syllabus": {
        "chapters": [
          "契约",
          "校验"
        ],
        "language": "zh-CN"
      }
    }
  }
]