不懂就问系列:如何不递归遍历层级结构?

Souce Data:

[
  {
    "Id": 1,
    "Name": "顶级",
    "Pid": 0,
    "Children": [
      {
        "Id": 2,
        "Name": "层级二 A",
        "Pid": 1,
        "Children": [
          {
            "Id": 5,
            "Name": "层级三 A",
            "Pid": 2,
            "Children": null
          }
        ]
      },
      {
        "Id": 3,
        "Name": "层级二 B",
        "Pid": 1,
        "Children": [
          {
            "Id": 4,
            "Name": "层级三 B",
            "Pid": 3,
            "Children": null
          }
        ]
      }
    ]
  }
]

Target Data:

[{
    "Id": 1,
    "Name": "顶级",
    "Pid": 0
},{
    "Id": 2,
    "Name": "层级二 A",
    "Pid": 1
}, {
    "Id": 5,
    "Name": "层级三 A",
    "Pid": 2
},{
    "Id": 3,
    "Name": "层级二 B",
    "Pid": 1
}, {
    "Id": 4,
    "Name": "层级三 B",
    "Pid": 3
}]